在窗体上画一个命令按钮，然后编写如下事件过程：　　Private Sub Command_Click( )　　　　S=0　　　　Do　　　　　　s=(s + 1) * (s +2)　　　　　　Number=Number+1　　　　Loop Until S＞=30　　　　Print Number，S　　End Sub　　程序运行后，输出的结果是()。

A．SELECT

B．CREATE

C．ALTER

D．DROP

The third officer’s duty is to（）when vessel is commanded under the pilot or captain.

A.operate the wheel and stand by

B.keep a lookout and operate steering gear

C.enter telegraph orders in the bell book

D.operate the telegraph and enter telegraph orders in the bell book