单项选择题

FTP使用的协议是（）。

A.UDP
B.ICMP
C.TCP
D.IP

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单项选择题
听力原文： Stonefish live among rocks in the sea. They have wide, turned-down mouths and small eyes. Their skin is the same colours as rocks. This makes a stonefish took like one of the rocks. Sometimes a swimmer will step on a stonefish. Then the fish will shoot some liquid into the swimmer's foot. The foot will become bigger and start to hurt. It may hurt for a long time. Because of the fish like the stonefish, the sea floor is sometimes not peaceful as it looks.How are the eyes of a stonefish?A．They are wide.B．They are small.C．They are turned-down.
A.
B.
How
C.They
D.
B．They
E.
C．They
F.
单项选择题
如果选中“删除时不将文件移入回收站，而是彻底删除”复选框，则文件一旦被删除将（）。

A.可以恢复
B.不可以恢复
C.部分可以恢复
D.部分不可以
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