【单选题】【消耗次数：1】
在液压传动系统中，吸油管路和回油管路一般用低压的水煤气有缝钢管，也可使用橡胶和塑料软管，控制油路中流量小，多用小直径铜管。该说法（ ）
①
正确
②
错误
参考答案：
复制
纠错
相关题目
【单选题】
油箱的结构设计时应注意的问题如下：油箱应有足够的刚度和强度；油箱要有足够的有效容积；吸油管和回油管应尽量相距远些；防止油液污染；油箱要进行油温控制；油箱内壁要加工。该说法（ ）
①
正确
②
错误
随机题目
【单选题】
— David injured his leg playing football yesterday.— Really? ______?
①
Who did that
②
Whats wrong with him
③
How did that happen
④
Why was that
【单选题】
--Do you dance? --Yes, I do.--________?--Every weekend.
①
：How hard do you practice
②
：How much do you pay for it
③
：How often do you go dancing
④
：How long do you practice it
【单选题】
--I went to the beach and got plenty of rest. --_______. You looked tired last time I saw you.
①
：I hope so
②
：Really
③
：Im glad you did
④
：The sound was nice
【单选题】
Some famous singers live on the _______from their record sales.
①
：salary
②
：price
③
：bill
④
：income
【单选题】
-- Whos speaking?-- This is Tom_____________.
①
：speaks
②
：spoken
③
：speaking
④
：saying
【单选题】
-- Wow! This is a marvelous room! Ive never known youre so artistic.--______
①
Great, I am very art-conscious.
②
Dont mention it.
③
Thanks for your compliments.
④
Its fine.
【单选题】
— Oh, Im sorry. But I promise Ill be more careful next time.— _______________________.
①
Its nothing
②
Oh, never mind. It doesnt matter
③
Thank you
④
There are no questions
【单选题】
-_________ Well, they got there last Wednesday. So about a week.
①
When did your parents arrive in Paris?
②
How long have your parents been in Paris?
③
Did your parents arrive in Paris last Wednesday?
④
When will your parents go to Paris？