引进浅冷装置中（）会引起冷凝器压力低。
A.装置中有不凝气
B.冷凝器供风压力不足
C.冷凝器中有过量的制冷剂
D.制冷剂数量不足
参考答案：D
用所给动词的正确形式填空
1. Does Linda agree _____(help) you copy her homework?
2. We have prepared _____(take) part in the dinner party.
3. The storm prevented us from _____(go) home.
4. In the class meeting, the teacher let students _____(make) a speech about saving water.
5. On New Year's Eve, families always _____(gather) together.
戊戌维新运动是一场资产阶级性质的政治改良运动，带有反帝爱国的性质。
