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【单选题】
水平角测量时视准轴不垂直于水平轴（横轴）引起的误差属于（ ）。A.
中误差
B.
系统误差
C.
偶然误差
D.
相对误差
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举一反三
【单选题】A group of volunteers go to the Green Lake Park to _____ litter every month. Shall we join them? [ ]
A.
stay up
B.
put up
C.
show up
D.
pick up
【单选题】关于欧几里得《原本》,以下叙述正确的是( )
A.
全书共分13卷，包括有15条公理、5条公设
B.
全书共分15卷，包括有5条公理、5条公设
C.
全书共分13卷，包括有5条公理、5条公设
D.
全书共分15卷，包括有15条公理、5条公设
【单选题】听力原文：It's amazing what you can see when you don't look. Astronomers often practice a technique known as averted vision to see very faint things. By looking to the side rather than straight on, they av...
A.
The term 'averted vision' refers to the act of looking out of the comers of one's eyes.
B.
If you want to see very faint things, you should better look sideways rather than straight on.
C.
The receptors located in the eye's center are less sensitive to dim light.
D.
To 'look' is to see something straight ahead.
【单选题】You don't look . You should a doctor. [ ]
A.
good; see
B.
well, see
C.
good; seeing
D.
well; to see
【简答题】紫外线消毒室内空气时，有效距离不超过（），照射时间为（）min，从亮灯（）min开始计时。
【简答题】MySQL 事务、视图的使用 请分别将 事务、视图创建和 使用的语句及结果截图上交。
【简答题】Doctor: ______? You don't look well.Patient: I broke my left leg when climbing the mountain yesterday.
【单选题】—What's wrong with you? You don't look _____. —My head hurts. [ ]
A.
good
B.
sick
C.
well
D.
ill
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