下列实验基本操作错误的是 [ ]
A．
B．
C．
D．
答案：D
— What _____ you see in the picture?
— I can see some flowers. [ ]
A. must
B. can
C. are
D. do
Http是一种( )。
A．超文本传输协议B．高级程序设计语言C．网址传输协议D．域名
