大面积抹灰前应设置标筋,抹石灰砂浆和水泥混合砂浆每遍厚度宜为( )mm。
A.7~9
B.8~10
C.7~10
D.8~12
参考答案:A
It took ability to get the job. It took luck, too.
A.rather than
B.other than
C.more than
D.less than
在中考体育考试的测试中,某同学1min跳了180次,若他的质量为40㎏,每次跳起的高度为5㎝,他跳一次做的功是 J,跳绳时的功率是 W(取g=10N/㎏)。