钢丝绳卡不得在钢丝绳上(),钢丝绳的公称直径为19~32毫米时,其绳卡的数量不得小于()。
参考答案:交替布置;4个
小明在阳光下测得旗杆的影长为4米,同时测得2米的竹竿长40厘米,请你算一下旗杆的实际长度.
It was suggested that the meeting _____ the next day.[ ]
A. be held
B. must be held
C. held
D. should hold