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【简答题】
The United States is full of 1 . There are still many families without cars, but some families have two or even more. However, cars are used for more than pleasure. They are 2 part of life. Cars are used for 3 . They are driven to offices and factories by workers who have no other way to get to their jobs. When salesmen are sent to different parts of the city, they have to drive in order to carry their 4 . Farmers have to drive into the city in order to get supplies. Sometimes small children must be driven to school. In some cities school 5 are used only when children live more than a mile from the school. When the children are too young to walk that 6 , their mothers 7 turns driving them to school. One mother drives on Mondays, taking her own children and neighbors ’ children as well. Another drives on Tuesdays, another on Wednesdays, and so on. This is called forming a car pool. Men also 8 car pools, with three or four men taking turns driving to the place where they all work. More car pools should be formed in order to put fewer automobiles on the road and to use less 9 . Parking is a great problem, and so is the 10 in and around cities. Too many cars are being driven. Something will have to be done about the use of cars.
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【简答题】关系模式是对关系结构的定义,是对关系“____________”的描述。
【单选题】Uncle Wang likes _____ apples, but today he doesn't like _________ apples. [     ]
A.
eating; eating
B.
eating; to eat
C.
to eat; eating
【单选题】,扩散退火的加热温度一般规定为( A )。
A.
钢的熔点以下100~200℃
B.
钢的熔点以上100~200℃
C.
Ac3以下100~200℃
D.
Ac3以上100~200℃,
【单选题】关系数据库是 (14) 的集合,其结构是由关系模式定义的。
A.
元组
B.
C.
字段
D.
【单选题】关系数据库是()的集合,其结构是由关系模式定义的。
A.
元组
B.
C.
字段
D.
【单选题】关系数据库是(2)的集合,其结构是由关系模式定义的。
A.
元组
B.
C.
字段
D.
【单选题】---Are those apples?---No,_____aren’t.
A.
they
B.
those
C.
those apples
【单选题】根据意大利马可波罗游记的记述,()是发明奶粉最早的国家 .
A.
美国
B.
日本
C.
英国
D.
中国
【单选题】在EC290B机型上,下列哪些动作可实现大臂双泵合流?
A.
单独做大臂提升动作。
B.
大臂提升+小臂收回动作。
C.
大臂提升+回转动作。
D.
大臂提升+行走动作。
【判断题】观世音菩萨左手持净瓶,右手杨柳枝,道场在山西五台山。 ( )
A.
正确
B.
错误
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