题目内容

According to the report, the North American health market_________ (grow) at a rate of about 7.4% in 2017. (2016,6. B)

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The contract won't come into effect until it ________ (sign) by the leagal representatives of both parties.(2018,2. A)

汽车转弯时,应是()转向中心。

A. 一个
B. 二个
C. 三个
D. 四个

转向系角传动比增大,则转向操纵力()

A. 增大
B. 减小
C. 不变

汽车的轴距越大,则转弯半径()

A. 越大
B. 越小
C. 没影响