节流式分配器是由一个分配本体和一个可装拆的（）喷嘴环组成。
参考答案：节流
—Mum, my little sister is crying all the time.
—Mary, be _____! She feels sick. You should take good care of her. [ ]
A. patient
B. lazy
C. polite
D. fair
同步发电机的基本型式只有旋转磁极式一种型式。（）
