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参考解析：
刷刷题刷刷变学霸
举一反三
【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
【多选题】窗的构造尺寸应包括预留洞口与待安装窗框的间隙及墙体饰面材料的厚度。下列间隙中符合的有（）mm。
A.
清水墙10
B.
墙体外饰面抹水泥砂浆或贴马赛克15~20
C.
墙体外饰面贴釉面瓷砖5~10
D.
墙体外饰面贴釉面瓷砖20~25
E.
墙体外饰面贴大理石或花岗岩板40~50