点荷法检测砌筑砂浆强度时,测试用的压力试验机,最小读数盘宜为()以内。
A.50kN
B.60kN
C.80kN
D.100kN
参考答案:A
He demanded ___ here in time.
A.us to get
B.that we arrived
C.we arrive
D.that we had reached
简述实施综合实践活动应遵循的原则