一般情况下，要求针阀的锥角较阀座的锥角大（）。

【名词&注释】

一般情况下(in general case)

[单选题]一般情况下，要求针阀的锥角较阀座的锥角大（）。

A. A．0.5°～1.0°
B. B．1.0°～1.5°
C. C．1.5°～2.0°
D. D．2.0°～2.5°

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学习资料：

[单选题]The lubricating oil is pumped from the drain tank, very often with （） in the suction line.

A. a filter
B. a strainer
C. a magnetic filter
D. a fine strainer

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A. be jammed
B. be opened
C. be seated
D. be broke

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