对于钢筋混凝土，补偿收缩混凝土刚性防水层的施工气温宜为（ ），不得在负温和烈日暴晒下施工。
A. 0~20℃
B. 5~35℃
C. 5~20℃
D. 20~30
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金刚烷胺的作用机理是：
A. 抑制多巴脱羧酶
B. 抑制单胺氧化酶
C. 激动DA受体
D. 阻断中枢胆碱受体
E. 促使纹状体残存的DA能神经元释放DA
混凝土振捣时，棒头伸入下层（ ）
A. 3~5cm
B. 5~10cm
C. 10~15cm
D. 20cm
现浇混凝土结构现浇混凝土井筒长度对中心线的允许偏差为（ ）
A. ±25mm
B. +0mm，-25mm
C. +25mm，-0mm
D. ±0mm
According to the passage, human beings can survive almost everywhere on Earth because______.
A. they have developed advanced forms of transportation
B. they have learned how to process seawater for drinking
C. their body temperature can vary considerably
D. their shelters and clothes help them to adapt themselves to the environment
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