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【简答题】
为了便于安装使用,真空发生器常与 、 和 等真空元件组合使用,称为真空组件,或称为组合真空发生器。
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举一反三
【单选题】In his research, what did Tom Henderson find about training in small firms?
A.
They spend too little on training.
B.
They are unaware of their training expenses.
C.
They receive state subsidies for training.
【单选题】下列有关化妆的说法正确的是（ ）
A.
服务员不适宜使用浓香型的化妆品
B.
服务员在工作时可化宴会妆
C.
化妆时要将眼部和嘴部作突出处理
D.
服务员工作时要将主要精力化在化妆上
【单选题】More often than not, employees in professional service firms ______.
A.
spend their time in managing
B.
finish their work day in and day out
C.
gain new knowledge
D.
adjust themselves towards the firm's objectives
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