单项选择题


A．build
B．divided
C．painted
D．allowed
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单项选择题
A．groupB．proposalC．sectionD．movement
A．group
B．proposal
C．section
D．movement
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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