建筑材料的物理性质中,与温度有关的性质包括( )。
A.耐水性
B.抗渗性
C.抗冻性
D.热容量
E.导热性
参考答案:D,E
蜗杆传动的传动比等于蜗轮齿数与蜗杆头数之比。( )
The chief editor asked the reporters to ________ the article so as to make it fit the space
available on the paper. [ ]
A. cut off
B. cut down
C. cut up
D. cut out