男性，38岁。因头痛、头晕15天，加重伴烦躁、频繁呕吐1天入院。

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问题单项选择题

男性，38岁。因头痛、头晕15天，加重伴烦躁、频繁呕吐1天入院。入院体检：生命体征不平稳。头部MRI显示第四脑室肿瘤伴幕上脑室扩大脑脊液快速流出后病人突然昏迷。双瞳散大，光反应迟钝。首先考虑的原因可能为()

A．穿刺损伤

B．小脑幕切迹上疝

C．肿瘤卒中

D．休克

E．低颅压

答案

参考答案：B

选择题

_______ of the warm water _______ already been used up. [ ]

A. Two-third; has

B. Two-third; have

C. Two-thirds; has

D. Two-thirds; have

选择题

(2013·安徽合肥二模)—The cars give off a great deal of waste gas in the streets.

—Yes. But I'm sure something will be done to ________ air pollution.

A．reduce

B．remove

C．collect

D．warn