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【单选题】
用非破损法和微破损法检测混凝土强度时,下列哪一个要求是不合理的?A.
用回弹法，每个构件10个测区，每个测区16个回弹点、一个碳化测量点
B.
用回弹法，环境温度不得低于-4℃、高于40℃
C.
用钻芯法，对均布荷载受弯构件，芯柱从距支座1/3跨度范围内中和轴部位取样
D.
用钻芯法，芯柱直径取10cm，芯样数量对一般构件不少于3个
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举一反三
【单选题】Sara kept the secret to ________ and nobody knew about it.
A.
hers
B.
her
C.
herself
D.
she
【单选题】Nobody knew who was the first ________ at school that morning when the window was broken.
A.
arriving
B.
arrived
C.
to arrive
D.
have arrived
【单选题】Nobody wanted to ________ matters for him though everyone knew that he was blameless. [ ]
A.
solve
B.
clarify
C.
handle
D.
set about
【单选题】综合布线系统双绞线电缆中常用的 4 对电缆有四种本色,它们是( )。
A.
蓝色、橙色、绿色和紫色
B.
蓝色、橙色、绿色和棕色
C.
蓝色、红色、绿色和棕色
D.
白色、橙色、绿色和棕色
【单选题】Nobody knew how he came up with this ______ idea about the trip.
A.
weary
B.
twilight
C.
unanimous
D.
weird
【单选题】Nobody knew _______ there.
A.
how long time I had been
B.
how long had I been
C.
how long time had I been
D.
how long I had been
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