液压系统中使用的液压泵，是其在单位时间内所能输出油液的（）是否可调节而分为定量泵和变量泵。
参考答案：体积
根据句意，在答题卡标有题号的横线上，写出括号内所给单词的适当形式。
小题1:She looks much _______ (health)than she used to be because she takes exercise every day.
小题2:Our English teacher has offered us some useful _______________ (suggest). I think they will help us a lot in our English study.
小题3:Please tell me the (lady) telephone numbers, I want to interview them.
小题4:You can see the _______( happy) on her face because she can't find her lovely dog.
浅反射有哪些？
