Many airlines now allow passengers to print their boarding passes online ______(save) their valuable time.
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His refusal ______ (cooperate )was embarrassing .
I shall teach you how ______(cook).
公路工程中设置的拌和站主要有()。
A. 水泥混凝土拌和站
B. 沥青混合料拌和站
C. 砂石拌合站
D. 稳定土拌和站
占地面积为5000平方米的水泥混凝土拌合站最低要配置( )台拌和机。