密封养护法中常用的密闭容器有()
A.密封货柜
B.密封木箱
C.密封铁桶
D.密封罐
参考答案:A, B, C, D
-What’s the chance of there _____an election this year?
- I have no idea.
A.is
B.to be
C.being
D.be
我国北方有哪四大著名石窟,这种工艺美术的本质是什么?