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【判断题】
楼梯平台深度不应大于其梯段宽度A.
正确
B.
错误
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【简答题】----How long has Sam been skating? ------He for five hours. A have been skating B has been skating C was skating D has been skated
【单选题】Tom is late. What ________ to him?
A.
should have happened
B.
must have happened
C.
can have happened
D.
would have happened
【单选题】下列不属于坦威斯 MK II防抱死制动系统特点的是:( )
A.
采用了 4 个轮速传感器
B.
对两前轮独立控制，两后轮一同控制
C.
采用了循环式液压调节器
D.
是非整体式三通道控制系统
【单选题】听力原文：Manl：Right，you all know why I've called this meeting．The Megadrome Park has had a serious drop in income over the last 6 months．Frank has circulated a report in which he makes it clear that he fe...
A.
the Park is too old to manage at present．
B.
the Park is suffering a loss in profit in the last quarter．
C.
the Park's profit has been falling in the past 6 months．
【简答题】（本题满分12分） 已知 是等差数列，其前n项和为 ，已知 求数列 的通项公式
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