单项选择题

The microscope enables scientists to distinguish a(n) ______ number and variety of bacteri

A． selectedB. incredibleC. verifiableD. unavoidable
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单项选择题
Her face ______ up with joy when she heard the good news.
A．lit
B．flared
C．showed
D．cheered
单项选择题
Since the accident he has walked with a ______.
A．slope
B．limp
C．lame
D．strain
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