【判断题】【消耗次数：1】
按照有无输出量的反馈分类，机电控制系统可以分为开环式机电控制系统和闭环式机电控制系统。
①
正确
②
错误
参考答案：
复制
纠错
相关题目
随机题目
【单选题】
You________return the book now. You can keep it till next week if you like.
①
cant
②
mustnt
③
neednt
④
may not
【单选题】
If you learned a bit about calligraphy, the ?art of writing Chinese characters, you would realize there ______ a lot of ?pleasure in it.
①
is
②
has
③
were
④
would be
【单选题】
Whenwearrived,wefoundthemeetingroomcrowdedwith______students.
①
quiteafew
②
onlyafew
③
few
④
afewquite
【单选题】
She_______ the door before she goes away.
①
had locked
②
is locking
③
has locked
④
was locking
【单选题】
—We all had a lot of fun at the barbecue ?yesterday. Pity you weren’t there.
—I really should have gone with ?you but I _______ on some remaining problems.
①
worked
②
was working?
③
would work
④
would have worked
【单选题】
When he was a boy,he used to go there and watch________.
①
to repair bicycles
②
bicycles to be repaired
③
bicycles being repaired
④
repairing bicycles