女性，36岁。反复头痛、流脓鼻涕1年余，耳鼻喉科诊断为慢性鼻窦炎。该患者头痛的特点是
A. 为全头痛
B. 平卧位可缓解
C. 多在清晨头痛
D. 月经期加重
E. 与情绪紧张有关
查看答案
Why do many people like vegetable gardening
A. Because gardening is something like art and science.
Because they regard it as a productive activity.
C. Because it gives them pleasure to spend time in winter.
D. Because vegetables can grow in gardens even in winter.
设随机变量X服从参数为2的指数分布，则随机变量Y=min(X，2)的分布函数( )
A. 是阶梯函数
B. 恰有一个间断点
C. 至少有两个间断点
D. 是连续函数
We are told that George expected Jim to help______
A. prove him innocent
B. him turns over a new leaf
C. lighten his punishment
D. him escapes from prison
According to the author, Mackintosh decided to enter the competition because ______.
A. not many drawings had to be submitted
B. no designs were required for furniture
C. there was no need to worry about cost
D. he had designed similar buildings before
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