单项选择题

A．Half a year ago.
B．Two months ago. (
C．One month ago.
D．Two weeks ago.

A.Half
B.
B．Two
C.One
D.
D．Two
E.

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A．It could be the cellphone equipment.
B．It could be the line upgrading.
C．It could be the man's wrong operation.
D．Not given.

A.It
B.
B．It
C.
C．It
D.
D．Not
E.

单项选择题

A．蝮蛇毒
B．竹叶青蛇毒
C．眼镜蛇毒
D．眼镜王蛇毒
E．银环蛇毒
属于火毒的蛇毒是

A.蝮蛇毒
B.竹叶青蛇毒
C.眼镜蛇毒
D.眼镜王蛇毒
E.银环蛇毒
属于火毒的蛇毒是