【单选题】
设<img src=https://huaweicloudobs.ahjxjy.cn/352D428A9C021C5A25E71F9FA8B1E5FA.png title=2IRD@UG~DTF~L9$A4[{O@MU.png alt=2IRD@UG~DTF~L9$A4[{O@MU.png/>为连续的可导函数,则下列命题正确的是( )
①
<img src=https://huaweicloudobs.ahjxjy.cn/6180A6A20DC7F9B8FB9C882BAE0176CD.png title=(2BS(}_@O7EHZLGR257%DB6.png alt=(2BS(}_@O7EHZLGR257%DB6.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/D59251589C432BB6A142DD2184BE04DE.png title=GH$]6Z}B52MFX~_H8$DT9RC.png alt=GH$]6Z}B52MFX~_H8$DT9RC.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/C0D101EE0CEF4C4AF5C4C3B659EA1F5D.png title=IIIHHP`~R7~UBP$UE047V4C.png alt=IIIHHP`~R7~UBP$UE047V4C.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/78D029F36B9061D42BE84CD0E19B0F03.png title=OC}(BSHVKIPP`ML4HK0M3AP.png alt=OC}(BSHVKIPP`ML4HK0M3AP.png/>
【单选题】
在1250 cm-1~400cm-1低频区。此区间红外线的能量较低,出现的谱带主要是各类单键C—X(X=C、N、O)的伸缩振动及各种基团弯曲振动的吸收峰,此区域为( )
【简答题】
1-2图中摆锤重G,其重心A点到悬挂点O的距离为l。试求图中三个位置时,力对O点之矩<img src="http://huaweicloudobs.ahjxjy.cn/1db4dcac6f645d542ab655fc03ea0593.png"/>
【单选题】
在Excel操作中,假设A1,B1,C1,D1单元分别为2,3,7,3,则SUM(A1:C1)/D1的值为( )。
【单选题】
若有语句char c1=`d`,c2=`g`;printf(“%c,%d\n”,c2-`a`,c2-c1);则输出结果为:()(a的ASCII码值为97)
【单选题】
利用会员O2O型属于微信群营销类型之一。该说法( )
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/5033EFB00A0FE484262EED8DBD5607BD.png title=M2{YIPWUFQN]T31O_[S$(BE.png alt=M2{YIPWUFQN]T31O_[S$(BE.png/>
【单选题】
Let’s make it round 9 o’clock.____________
④
Would some time later be convenient?
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/A88F9C0CDEBA3F48EBAF3020167254BC.png title=M5LZ5FM2O8%3%P2{7V%JM44.png alt=M5LZ5FM2O8%3%P2{7V%JM44.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/8C33F1250213D149FC943A1AEE294C10.png title=OD5%LWEY(]}XYEHB)XW]QXS.png alt=OD5%LWEY(]}XYEHB)XW]QXS.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/E3B7721D97C5872A24C624EF7C46396A.png title=CJM%AYE(YFJ2$NU~2G94E`K.png alt=CJM%AYE(YFJ2$NU~2G94E`K.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/BC4DE476FDC897F63970527654C37252.png title=DR@SCPJRH3THKW%6](%ENX0.png alt=DR@SCPJRH3THKW%6](%ENX0.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/1639E56B30DDE42B27547ACDC07908D7.png title=7{L_F{`XTDKJ}NES@353(KC.png alt=7{L_F{`XTDKJ}NES@353(KC.png/>
【单选题】
—Guest: Oh, it’s ten o’clock. I’d better go now.—Host: ____.
①
OK. Please walk slowly and take care.
②
Why do you want to go now? Don’t you want to stay?
③
Yeah, it’s really late. Why not immediately?
④
Won’t you stay for another cup of coffee?