在地下洞室中钻孔埋设多点位移计，最深点锚头应设置在预计岩体变形范围以外。
查看答案
深圳证券交易所上市开放式基金（LOF）合同生效后即进入封闭期，该封闭期一般不超过（）。
A. 3个月
B. 2个月
C. 4个月
D. 1个月
The best method of protecting that portion of a fiber anchor line nearest the anchor from chafing on the bottom is by（）.
A. Using a small scope ratio
B. Replacing that portion with a short length of chain
C. Using a hockle to keep that portion of the anchor line off the bottom
D. Using a synthetic line
微信支付 
支付宝支付