皮皮学，免费搜题
登录
搜题
【多选题】
气泵主要分为( )A.
电动气泵
B.
手动气泵
C.
脚动气泵
D.
机械气泵
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】We _____ his luggage; his brother carried it himself.
A.
needn’t have carried
B.
didn’t need carrying
C.
needed to have carried
D.
didn’t need to carry
【简答题】We ______ his luggage; his brother carded it himself． A．needn't have carried B．didn't need carrying C．needed to have carried D．didn't need to CalTy
【单选题】Knowing that the slightest mistake meant losing his job, the waiter carried the expensive glasses______ from the kitchen.
A.
cautiously
B.
gravely
C.
profoundly
D.
radically
【简答题】控制系统PID控制器中引入（）作用是为了消除余差，引入（）作用是为了克服容量滞后；但积分的引入会使系统产生振荡现象。
【单选题】We his luggage; his brother carried it himself.
A.
needn’t have carried
B.
didn’t need carrying
C.
needed to have carried
D.
didn’t need to carry
【单选题】He expected his orders (A) to be carried out (B) on spot (C) .
A.
orders
B.
be carried out
C.
on spot
【单选题】Doubting that the traveler carried drugs, the Customs officer stopped him and _______ his suitcase, but found nothing at all.
A.
looked up
B.
went through
C.
searched for
D.
referred to
【单选题】It is desired that his order______ as soon as possible.
A.
will be carried out
B.
should be carried out
C.
must be carried out
D.
would be carried out
相关题目：
参考解析：
知识点：
题目纠错 0
发布
