平衡罐加注消泡剂是靠介质()和高差注入采气管线。
A、自身质量
B、数量
C、体积
D、压力
参考答案:A
I won’t go to the concert this evening. I ________ watch the NBA on TV. It’s more exciting.
A.had better
B.would rather
C.prefer
D.have to
—The pet dog in your hand is very nice. Is it (). —Yes, but I'll give it to my friend, Lucy, as ()birthday present.
A. you; her
B. yours; hers
C. yours; her
D. you; hers