（）制冷压缩机为速度型压缩机。
参考答案：离心式
联结说关于学习的主要定律有（）。
A．练习律
B．效果律
C．准备律
D．情感律
E．惩罚律
Which of the following sentences uses similes
A．His words stabbed at her heart.
B． My love is a red, red rose.
C．The son looks like his father.
D．The nurse looks like an angel.
