—Where are you going to work?
—I'm not sure . [ ]
A. already
B. yet
C. just
D. before
答案:B
我国的平原以哪种土地利用类型为主[ ]
A.草地
B.林地
C.沙漠
D.耕地
试述涂料涂层检验中,“脱落,咬底,漏涂,起泡”的具体含义?