对于固定性销售费用只需要按项目反映全年预计水平。 ( )
参考答案：对
—What do you think the ___________should do first?
—They should learn to take ___________as well as share rights in life.
A．grown-up;responsibility
B．growns-up;responsibility
C．grown-ups;responsibilities
D．growns-ups;responsibilities
目前世界上无人机的频谱使用主要集中在UHF、L和（）波段
A.C
B.VHF
C.任意
