In battery charging rooms，ventilation should be provided（）.
A. at the lowest point
B. near the batteries
C. at the highest point
D. only when charging is in progre
产品投向应坚持（）为重点，做深做大做强。
A. 住房按揭业务
B. 个人经营性贷款
C. 小型工程设备贷款
D. 商铺按揭贷款
If passengers are on board when an abandon ship drill is carried out，they should（）.
A. take part
B. watch
C. go to their quarters
D. stay out of the way and do what they want
在满足结构使用条件下，应尽量（）结构的刚度，以降低应力集中。
A. 增加
B. 减少
C. 不变
微信支付 
支付宝支付