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【简答题】
根据句意及首字母提示补全单词。 1. There's a s _____ 'When in Rome, do as the Romans do. ' 2. W_____ like traveling when they are free. 3. In China, dinner is usually s_____ at around 12 o'clock. 4. A year l_____, he went to college. 5. C_____up, perhaps we'll win the next time. 6. C_____ are only used when people eat Chinese food. 7. At the s _____ of a meal, if you're the guest, you'll be invited to serve yourself. 8. There was no e _____ for that accident. 9. Please be careful when you c_____ the street. 10. G_____, fewer dishes are prepared in western countries than in China. 11. You are e_____ to stay here for another hour if you like. 12. My p_____ is filled with some meat.
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【简答题】一手动蜗杆传动起重装置如图4-6所示。已知该蜗杆传动的有关参数为：m＝8mm，q＝8，z 1 ＝1，z 2 ＝40；卷简直经D＝200mm。试求： (1) 使重物上升1m手柄所转圈数n 1 ，并在图中标出手柄的转向； (2) 若蜗杆和蜗轮之间当量摩擦系数f v ＝0.2，求传动的啮合效率η 1 ，并说明该传动能否自锁? (3) 若起重量Q＝10 4 N，人手推力P＝200N，求手柄长度L； (4)...
【单选题】What is the woman going to do this Sunday afternoon?
A.
She is going to an exhibition abroad.
B.
She is going to a wedding ceremony.
C.
She is going on a voyage over the Pacific.
D.
She is going to an art museum.
【简答题】This is a picture of Mr Wang’s family. The man in the middle is Mr Wang, the father. The woman is the mother. They have two daughters. One is Wang Fang. She is twelve. The other is Wang Li. She is thi...
【单选题】What is the woman trying to accomplish in this conversation?
A.
Convince the man that they should rest for a while.
B.
Teach the man about the types of clouds.
C.
Entertain the main with some interesting weather stories.
D.
Persuade the man to turn around and go down the hill.
【单选题】Man: Is the freeway always this deserted? Woman: It's the middle of the day. Everyone is at work. Question: What does the woman imply?
A.
The freeway isn't usually as empty as it is now.
B.
Many prefer to eat dessert in the middle of the day.
C.
The freeway isn't working in the middle of the day.
D.
Most people prefer to work at night.
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