[单选题]Open steam is being blown into the tank, mixing with the other materials in it. Closed steam is passing through a coil, being kept separate from the tank contents.本句使用进行时强调两种蒸汽( )。
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2023-10-01 08:01:39
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[单选题]Open steam is being blown into the tank, mixing with the other materials in it. Closed steam is passing through a coil, being kept separate from the tank contents.本句使用进行时强调两种蒸汽( )。

A.不同动作的持续性
B.正在进行
C.通常发生
D.过去进行
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