单项选择题

Unless (they are so permitted) by the attending (physician), no visitors or relatives (can) enter, the (patient's) room

A．they are so permitted
B．physician
C．can
D．patient's
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单项选择题
Due in large part to the complexity of its structure--over two hundred bones ______ together by ligaments--the human skeleton is a marvel of architectural construction.
A．binding
B．bound
C．bounded
D．bind
单项选择题
______ sugar ______ salt is oil water.
A．Not as... as
B．No more than... as
C．Not more than... is
D．Not more than... as
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