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【单选题】
地震动的卓越周期指的是
A.
地震动到达的建筑物的固有周期
B.
地震动振幅谱中幅值最大的频率分量对应的周期
C.
场地土的特征周期
D.
场地土的固有周期
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】The report of an earthquake(地震) in the south China Sea has not been _____ yet.
A.
conflicted
B.
confused
C.
confined
D.
confirmed
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s surface, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
it was caused by some ancient convulsion
B.
its presence is an embarrassment to the state of Colorado
C.
it looks like an injury on the Earth’s surface
D.
it has caused many visitors to injure themselves