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【单选题】
GPS卫星之所以要发射两个频率的信号,其主要目的是为了 。
A.
消除对流层延迟
B.
消除电离层延迟
C.
消除多路径误差
D.
增加观测值个数
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举一反三
【单选题】The children play football on the road.
A.
mustn't
B.
must
C.
have to
D.
may
【单选题】周围环境状况是否良好、交通是否有利于商品运输是确定商业用房位置优劣的首要因素。( )
A.
正确
B.
错误
【简答题】n. [C] a lawyer 律师
【简答题】Reading comprehension. There was a little dog in the street. He liked watching the children play. One day, he followed two children home from school. Suddenly, he saw the children's house was on fire....
【判断题】周围环境状况是否良好、交通是否有利于商品运输是确定商业用房位置优劣的首要因素。 ( )
A.
正确
B.
错误
【单选题】How long did the children play?
A.
Two hours.
B.
One hour and a half.
C.
Half an hour.
【简答题】Whenever it is possible , the children play outside in the fresh air.
【单选题】Where did the children play?
A.
In the room.
B.
In the cla ssroom.
C.
In the dining room.
【判断题】周围环境状况是否良好、交通是否有利于商品运输是确定商业用房位置优劣的首要因素。(2009年试题)
A.
正确
B.
错误
【简答题】传播学研究两大研究流派的不同只要体现在目的、___ 和方法的不同。
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