如何更改操作级别?
参考答案:
用chg_l回车,3stooges进入level2;
4beatles进入level3.
Scientists are increasingly _____ that the earth is getting hotter because of carbon dioxide and other gases.
A.convinced
B.confident
C.concerned
D.conscious
穿过楼板的套管应伸出地面()cm。
A、5-10
B、4-8
C、3-6
D、10-20