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问题 单项选择题

提高接触面刚度的一种办法是（），这样不但消除了配合面间的间隙而且能使机床部件一开始工作就有较大的实际接触面积。

A.调整各滑动面的间隙

B.刀杆的锥柄加拉钉

C.工件装夹要牢固

D.予加载荷

答案

参考答案：D

单项选择题

A young man was going to join the army (军队) and had to (41) a medical examination. The doctor was sitting at a desk when he came in. He said to the man, "Take your coat and shirt off and (42) on that chair.
The young man did so. The doctor looked at him for a moment without (43) up from his chair and then said, "All right. Put your clothes on again.
"But you haven’t examined me at ail!" the young man said in (44) .
"There is no need to do so," the doctor said with a (45) .
"When I (46) you to take your coat and shirt off, you heard me all right, so there is nothing wrong with your (47) . You saw the chair, so your eyes are (48) . You could take your clothes off and sit on the chair, so you must be in good health. And you understand what I told you to do and did it without a (49) , so you (50) healthy enough for the army.\

[A] told[B] tell[C] will tell
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单项选择题

女性，34岁，溃疡病穿孔行修补术后10天，体温38℃，粘液便4～6次/天，伴有里急后重及尿频、排尿困难，直肠指诊前壁有肿物。此病人应考虑是

A．细菌性痢疾

B．肠道功能紊乱

C．膀胱炎

D．盆腔脓肿

E．直肠癌
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