绝密级国家秘密载体应当存放在()中。
参考答案:密码保险柜
The old temple damaged in the earthquake _____ the Qing Dynasty. [ ]
A. is dated back to
B. dates from
C. dated back to
D. was dating from
工业上使用的氧化剂要与具有哪类性质的化学品远远分离?()
A、易燃性液体
B、腐蚀性液体
C、还原剂