【单选题】【消耗次数：1】
热水系统设置膨胀罐的主要作用是（ ）。
①
容纳水膨胀后的体积
②
定压
③
机械循环中排出系统空气
④
蓄水
参考答案：
复制
纠错
相关题目
随机题目
【单选题】
—Its nice meeting you.—_________________.
①
Nice to meet you.
②
Nice meeting you too.
③
So do I.
④
Thats very kind of you.
【单选题】
Its free, so you neednt ____________ money ____________ me.
①
give...to
②
pay...for
③
borrow...from
④
cost...for
【单选题】
— Could you put me through to room 1032?—_________________.
①
No, you couldnt.
②
Ok, one moment please.
③
No, I cant do it.
④
Yes. Why do you call him?
【单选题】
It sounds ridiculous if hotels _____________ guests extra for Wi-Fi service.
①
pay
②
take
③
spend
④
charge
【单选题】
—When will you arrive, madam?— .
①
Thank you very much.
②
Four nights.
③
On May the 4th.
④
I dont know.
【单选题】
They are not only teachers __________ our friends
①
but for
②
but also
③
however
④
whoever
【单选题】
—Hello there, what can I do for you, sir?—_____________________.
①
I can do it myself.
②
No, youre welcome.
③
I would like to buy a pair of glasses.
④
Yes, thank you.
【单选题】
__________ we may say, he will not not believe us.
①
Whatever
②
Whenever
③
Wherever
④
Whoever
【单选题】
He is writing his stories ___________ Monday___________Friday.
①
both...and
②
either...or
③
from...to
④
between...and