花卉顶芽易枯死，新叶叶尖弯钩状，并相互粘连，不易伸展是缺（）引起的。
A.N
B.P
C.K
D.Ca
参考答案：D
Steve, could you help me ___________ when the plane will take off on the Internet?
-I'm sorry, my computer doesn't work.[ ]
A. get on
B. find out
C. look for
D. look after
全艇性登记簿填写要求（）等。
A、无漏填
B、按规定及时填写
C、无撕页
D、可擦改
