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【简答题】
Hunter and Nina are husband(丈夫)and wife. They get up about 4:50 in the morning. When many people are sleeping in their warm beds, they are working. They work outside and walk a lot. They do not work when it is raining. They also work on weekends. Her name is Sara. She sometimes goes to work in the morning, and sometimes goes to work at night when she is on duty(值班). She works in a big building. There are many beds in it. She wears a white hat and a white dress. She says:” I meet many people every day. I look after them. They need my help. That’s my job. It’s hard, but I like it.” He is Jim’s father. He usually leaves home very early. He does not work in a factory. He goes to work on foot or by bike. It is far from his home. He usually works in the day and has lunch outside in the sun. His work is very hard. He often brings us rice, eggs and vegetables. He can have a good rest(休息)in winter. She goes to work by bus every day. She works in a building. It opens at 8 a.m. and closes at 6 p.m. There are many good foods, drinks and other things. Children like to go there. She meets many people every day. She often says, “Can I help you?” When she meets people. She says, “My work is not easy. I must stand all day and be friendly to everyone”. 小题1:What jobs do they have? A.Farmer, doctor, driver and cleaner(清洁工) B.Cleaner, nurse, farmer and shopkeeper C.Postman, nurse, driver and teacher D.Driver, doctor, cleaner and shopkeeper 小题2:Hunter and Nina doesn’t work _____. A.from Monday to Friday B.at weekends C.on workdays D.on rainy days 小题3:Does Sara like hard work? A.Yes, she does. B.She doesn’t know. C.No, she doesn’t. D.We don’t know. 小题4:In what season (季节)does Jim’s father stop working? A.In spring B.In summer C.In autumn D.In winter 小题5:Who works hard and is kind to people when they come to her/him? A.The first B.The second C.The third D.The fourth
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【单选题】圆管湍流过渡区的沿程摩阻系λ
A.
与雷诺数Re有关
B.
与管壁相对粗糙度有关Δ/d有关
C.
与Re和Δ/d有关
D.
与Re和管长L有关
【单选题】圆管湍流过渡区的沿程摩阻系数λ
A.
与雷诺数R e 有关;
B.
与管壁相对粗糙度△/d有关;
C.
与R e 和△/d有关;
D.
与R e 和管长l有关。
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A.
肝板内相邻肝细胞间
B.
肝细胞与血窦内皮之间
C.
肝板之间
D.
肝巨噬细胞与内皮细胞之间
E.
贮脂细胞与血窦内皮之间
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A.
0
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630
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20
D.
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0
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630
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20
D.
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【单选题】圆管湍流过渡区的沿程摩阻系λ
A.
与 雷诺数R e 有关
B.
与管壁相 对 粗糙度有关 Δ / d 有关
C.
与 Re 和 Δ / d 有关
D.
与 Re 和管长 L 有关
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