【单选题】【消耗次数：1】
<img src=https://huaweicloudobs.ahjxjy.cn/D1AD9CC020FD6A3EF431D89A836BAC1C.png title=QQ图片20160107174737.png alt=QQ图片20160107174737.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/5DED946CB37968FFCDEE980EE0F74E08.png title=QQ图片20160107174756.png alt=QQ图片20160107174756.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/7685B4796DEEFB6F28EB1E89F99C9953.png title=QQ图片20160107174812.png alt=QQ图片20160107174812.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/1E15256789247ADBB5B14BD99570D9AD.png title=QQ图片20160107174824.png alt=QQ图片20160107174824.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/5FDE41C37AB2607F2BD262CE5B0681F1.png title=QQ图片20160107174839.png alt=QQ图片20160107174839.png/>
参考答案：
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相关题目
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/A7680902CB99663BA6E23408C5C4ABFB.png title=QQ图片20160108111419.png alt=QQ图片20160108111419.png/><img src=https://huaweicloudobs.ahjxjy.cn/F7C836FE5C2376120035EBE3D8C699B9.png title=QQ图片20160108111439.png alt=QQ图片20160108111439.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/51A1F02268CD4EAF0D1BB4C81A2C8981.png title=QQ图片20160108111454.png alt=QQ图片20160108111454.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/FAF724DB88B6F9338819B0ACF799FC7E.png title=QQ图片20160108111507.png alt=QQ图片20160108111507.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/D6D9581D650D608E065C2881AE35D6A8.png title=QQ图片20160108111520.png alt=QQ图片20160108111520.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/F1950DBF13A5E2F6DF6D0A2E7B40036B.png title=QQ图片20160108111532.png alt=QQ图片20160108111532.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/BB6602F8EBCDCBC4325AC6C2D402AC62.png title=QQ图片20160108172103.png alt=QQ图片20160108172103.png/><img src=https://huaweicloudobs.ahjxjy.cn/2185028B122EA820C3F12899EF40B3B5.png title=QQ图片20160108172114.png alt=QQ图片20160108172114.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/CC23C6DB5BA0BF66BBFFC2864C452A86.png title=QQ图片20160108172123.png alt=QQ图片20160108172123.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/EED4D03BD0C27BA6DF81137CB7AD483D.png title=QQ图片20160108172134.png alt=QQ图片20160108172134.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/161D2BDBBB638F1AEC50FA43244D2A9D.png title=QQ图片20160108172143.png alt=QQ图片20160108172143.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/3E2F5DB12481695A27D0760789A13712.png title=QQ图片20160108172158.png alt=QQ图片20160108172158.png/>
【单选题】
设D是圆环<img src=https://huaweicloudobs.ahjxjy.cn/C1E9D12458DFD4A14CD3882562ECD317.png title=QQ图片20160224231208.png alt=QQ图片20160224231208.png/>，且<img src=https://huaweicloudobs.ahjxjy.cn/19CA4355701DCCA8E9BFC90709B1C2E6.png title=QQ图片20160224231228.png alt=QQ图片20160224231228.png/>则<img src=https://huaweicloudobs.ahjxjy.cn/D387AD7A8CB622BCD1F542C7C350B136.png title=QQ图片20160224231244.png alt=QQ图片20160224231244.png/>（ ）
①
<img src=https://huaweicloudobs.ahjxjy.cn/9E7A64637000AEC0789E48D1E96AD66E.png title=QQ图片20160224231302.png alt=QQ图片20160224231302.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/AFF8BA7BECE58AC3901A521D7A606F30.png title=QQ图片20160224231314.png alt=QQ图片20160224231314.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/7E7DDA627E10663C0016B52FA149DC3A.png title=QQ图片20160224231331.png alt=QQ图片20160224231331.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/12F7546764221D5997C3F99846C7FF70.png title=QQ图片20160224231344.png alt=QQ图片20160224231344.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/E6F971FB23292AC5709EA0115127AB58.png title=QQ图片20160108154849.png alt=QQ图片20160108154849.png/><img src=https://huaweicloudobs.ahjxjy.cn/5CB2221C3D5876AD4ABC8F2B98D369AE.png title=QQ图片20160108154908.png alt=QQ图片20160108154908.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/9B3F683BB8BFB18660A35E24AD62557A.png title=QQ图片20160108154934.png alt=QQ图片20160108154934.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/A109FD62F164A97C17B9DFDBF40254CE.png title=QQ图片20160108154954.png alt=QQ图片20160108154954.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/0F3A702C9B959C5BA3AF810621C9AD06.png title=QQ图片20160108155039.png alt=QQ图片20160108155039.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/DEC11963ACB1713AA5E8D649B4C0BE8B.png title=QQ图片20160108155055.png alt=QQ图片20160108155055.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/F22E424670D48EA8B00BF875A572F6D9.png title=QQ图片20160108102117.png alt=QQ图片20160108102117.png/><img src=https://huaweicloudobs.ahjxjy.cn/A7B8AB7EFE9A8EC7C2D83F83CE6AD874.png title=QQ图片20160108102145.png alt=QQ图片20160108102145.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/D1158E7E2A11A9F3FF830DEDCACFCE40.png title=QQ图片20160108102201.png alt=QQ图片20160108102201.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/5E167DEDAC45510EE9C136A2850BAEEB.png title=QQ图片20160108102216.png alt=QQ图片20160108102216.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/EAC49782558574996690E7E54E04DB82.png title=QQ图片20160108102237.png alt=QQ图片20160108102237.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/A97A1286364D01DF4D8429E6D441571A.png title=QQ图片20160108102252.png alt=QQ图片20160108102252.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/711964D1CA5D3A0F1C363FEDDE9F9E1D.png title=QQ图片20160108110719.png alt=QQ图片20160108110719.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/CD839C58CCD85FB44DF45818DB7297B8.png title=QQ图片20160108110831.png alt=QQ图片20160108110831.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/C7AB4B181E7BCF9BFDCDA87CAEB15A85.png title=QQ图片20160108110843.png alt=QQ图片20160108110843.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/027FD4F419E4F24843FC35AC624287EC.png title=QQ图片20160108110855.png alt=QQ图片20160108110855.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/32D0EDF27D20E603E4BE73C2A2CB5B4B.png title=QQ图片20160108110908.png alt=QQ图片20160108110908.png/>
【单选题】
设<img src=https://huaweicloudobs.ahjxjy.cn/EA6FB79FF8DF7A9F3A2D0CEB093C717F.png title=QQ图片20160224214006.png alt=QQ图片20160224214006.png/>在<img src=https://huaweicloudobs.ahjxjy.cn/DF3DA077C2189146990B3800DA1E18ED.png title=QQ图片20160224214023.png alt=QQ图片20160224214023.png/>的偏导数存在，则<img src=https://huaweicloudobs.ahjxjy.cn/61AF63E59A60D6B49960C25A0B85414F.png title=QQ图片20160224214038.png alt=QQ图片20160224214038.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/588DCE737E539AFE5318232DBC0C8858.png title=QQ图片20160224214107.png alt=QQ图片20160224214107.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/1898B210FBB62DA4DA7997BB95A4D586.png title=QQ图片20160224214125.png alt=QQ图片20160224214125.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/C9D08ECB097A69F4F22594D120D687E7.png title=QQ图片20160224214140.png alt=QQ图片20160224214140.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/6101D759594C1C2892D8E9F8195520C5.png title=QQ图片20160224215328.png alt=QQ图片20160224215328.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/CA977EAF174ABEA8D98572494901DEA6.png title=QQ图片20160108165530.png alt=QQ图片20160108165530.png/><img src=https://huaweicloudobs.ahjxjy.cn/9CFC6BDC5CABDBA9BC689F2757C70809.png title=QQ图片20160108165542.png alt=QQ图片20160108165542.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/8B20C4790FE0AFEE7E5AD0A25E146D33.png title=QQ图片20160108165552.png alt=QQ图片20160108165552.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/CD375EF57CF5BEC51FCB663131E76075.png title=QQ图片20160108165602.png alt=QQ图片20160108165602.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/0D6F53BC545A4B151069E02879A1AF83.png title=QQ图片20160108165611.png alt=QQ图片20160108165611.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/9B31FC6625A74D69B56755295A5BFDDB.png title=QQ图片20160108165621.png alt=QQ图片20160108165621.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/E0422C097CECA95874B1F55FD9A8718F.png title=QQ图片20160108155415.png alt=QQ图片20160108155415.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/61BA6BCDF87808D1A74A3CE96923A50D.png title=QQ图片20160108155449.png alt=QQ图片20160108155449.png/>
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<img src=https://huaweicloudobs.ahjxjy.cn/3BB91EB6E052874B32BD66EBCB9A623C.png title=QQ图片20160108155501.png alt=QQ图片20160108155501.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/C59EF8FE4EBAC1DA3BFB003260A88E88.png title=QQ图片20160108155514.png alt=QQ图片20160108155514.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/777539F4B069324BEB0525AC3CD226B5.png title=QQ图片20160108155526.png alt=QQ图片20160108155526.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/BA431F283877766D27868D3013ABD5B8.png title=QQ图片20160108161448.png alt=QQ图片20160108161448.png/>＝（ ）。
①
<img src=https://huaweicloudobs.ahjxjy.cn/348F97BE382E037727723C780F8F559A.png title=QQ图片20160108161505.png alt=QQ图片20160108161505.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/EB5F5F8C1F76B567D3A765D7E259AC8F.png title=QQ图片20160108161517.png alt=QQ图片20160108161517.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/2A31BE7FD0312DDF2F74DBB5C4729669.png title=QQ图片20160108161528.png alt=QQ图片20160108161528.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/8CC9FABE491EF9031690A400233AD331.png title=QQ图片20160108161539.png alt=QQ图片20160108161539.png/>
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