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问题
单项选择题
工程材料的检验程度，有（）三种类型。
A．免检、自检、专检
B．免检、抽检、全检
C．免检、专检、全检
D．自检、互检、专检
答案
参考答案：B
选择题
— There is a story here in the paper about a 110-year-old man.
— My goodness! I can't imagine ____ that old.
A. to be
B. to have been
C. being
D. having been
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判断题
桩端位于坚硬持力层时，此类桩属于端承桩。
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