比列尺是刻有不同比例的直尺,一般比列尺上有()种比列。
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Itmaybe()(补充)byindividualcardsissuedtoeachmemberofthecrew.
A. supply
B. supplemented
C. supplied
D. supplies
Thesignalsthatwillbeusedforemergencyshouldbeclearly()(列出).
A. putout
B. setout
C. seton
D. puton
Closeallfiredoorsandusethe()(干粉灭火器).
A. drypowderextinguisher
B. foamextinguisher
COextinguisher
D. portableextinguisher
Theairis()(有毒的).
A. humid
B. damp
C. toxic
D. mould