【单选题】【消耗次数：1】
怀疑高危胸痛，接诊后（）分钟内需完成心电图检查
①
15
②
20
③
10
④
30
⑤
60
参考答案：
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相关题目
【单选题】
已知A、B、C三点坐标分别为（10、20、30）（20、40、60）、（30、60、90），则A、B、C三点______。
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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表示一个平面
②
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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不能表示一个平面
③
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
/* Style Definitions */
table.MsoNormalTable
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表示一个特殊位置平面
④
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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无法判断
【单选题】
已知四点A（10、20、30）、B（30、20、10）、C（10、20、10）、D（20、20、30），则对H面的重影点为______。
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
A与D，D点可见
②
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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B与C，B点可见
③
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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A与C，A点可见
④
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
/* Style Definitions */
table.MsoNormalTable
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A与C，C点可见
【单选题】
已知三点A（10、20、15）、B（10、0、30）、C（0、10、0），则在坐标面上的点为______。
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
/* Style Definitions */
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A、B、C三点
②
Normal
0
7.8 磅
0
2
false
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EN-US
ZH-CN
X-NONE
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B点
③
Normal
0
7.8 磅
0
2
false
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ZH-CN
X-NONE
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B、C两点
④
Normal
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0
2
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C点
【单选题】
49岁，男性，劳累后发作胸痛，疑为心绞痛，其心电图依据是
①
窦性心动过速
②
T波高大
③
ST段呈短暂的抬高形成单向曲线
④
ST段下移，T波低平，双向，倒置
⑤
左室肥厚劳损
【单选题】
设一个关系模式为R(A,B,C),对应的关系内容为R={{1,10,50},{2,10,60},{3,20,72}{4,30,60}},则δB>15(R)的运算结果中具有的元组个数为（ ）。
①
1
②
2
③
3
④
4
随机题目
【单选题】
84、（ ）时，新鲜风流由进风上山进人采区，清洗工作面后的污风经回风上山流入回风道，新风和污风均向上流动，沿倾斜方向的风路较短。而时，新鲜风流由进风下山进
①
下山开采
②
上山开采
③
上下山开采
【单选题】
63、（ ）采煤法的实质就是在厚煤层中，沿煤层(或分段)底部布置一个采高2-~3 m长壁工作面，用常规方法进行回采，利用矿山压力的作用或辅以人工松动方法，使支架上方顶煤破碎成散体后由支架后方(或上方)放出，并经由刮板输送机运出工作面。
①
走向长壁
②
放顶煤
③
倾斜长壁