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问题 单项选择题

动脉血碳酸氢盐20mmol/L，pH7.6，PaC0220mmHg，提示（）

A.正常酸碱平衡

B.呼吸性碱中毒

C.代谢性酸中毒

D.代谢性碱中毒

E.呼吸性酸中毒

答案

参考答案：B

填空题

用所给词的适当形式填空。

1. His father worked for thirty hours without _____(stop) .

2. It was a temporary _____ (peaceful),and an other war soon broke out.

3. Lei Feng is well-known for _____ (help) other people.

4. His grandmother _____ (bury) in his home-town, Shandong Province.

5. The doctors decided to _____ (operation)on his mother at once.
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选择题

关于匀速直线运动的速度v=

s
t
，下列讨论正确的说法是（　　）

A．物体运动速度v越大，通过的路程s越长

B．物体运动速度v越大，所用时间t越少

C．v的大小由s/t决定，但与s、t的大小无关

D．上述说法都正确
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