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【多选题】
变频器按控制方式可分为()。A.
压频比控制变频器
B.
矢量控制变频器
C.
转差频率控制变频器
D.
通用变频器
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皮皮学刷刷变学霸
举一反三
【单选题】下列关于透视的叙述，哪项是错误的?( )
A.
透视前医生要充分暗适应
B.
电视透视要开启影像增强装置
C.
病人要脱 去外衣，取出衣袋内杂物
D.
透视时应按一定顺序， 照射野大小适当，受检部位贴 近荧光屏或影像增强器
E.
透视时脚开关不要断续
【单选题】葛老师逛街的时候发现很多爷爷奶奶都喜欢去永辉超市买菜,因为永辉超市的大米和鸡蛋非常便宜,但是其他商品都是正常价格甚至略高于其他超市,这种定价策略被称为?
A.
声望定价
B.
招徕定价
C.
尾数定价
D.
整数定价
【单选题】The belief is generally held_____communicative skill is a must nowadays in hunting for a job.
A.
what
B.
that
C.
which
D.
as
【单选题】Generally speaking, _______ graduate from ________ famous university is more likely to find a job.
A.
a ; a
B.
/ ; the
C.
the ; a
D.
the ; the
【简答题】A．He could take a taxi, and then change to a bus. B．He must first take the underground and then change to the shuttle bus. C．He could take bus, shuffle bus, or the underground. D．He could take the und...
【单选题】下列关于双眼视野的叙述，哪项不正确
A.
两眼鼻侧视野相互重叠
B.
两眼视网膜上各形成一个完整的物像
C.
来自物体同一部分的光线成像于两眼视网膜的对称点上
D.
同一被视物体在两眼视网膜上的像完全相同
【单选题】Tim doesn ’ t think it is a physical change,_____ _____?
A.
does he
B.
doesn ’ t he
C.
is it
D.
isn ’ t it
【单选题】What change is NOT stated in the memo?
A.
The change will take place next month.
B.
Phones may need to be reprogrammed.
C.
Authorization numbers will be made longer.
D.
Local calls will require an authorization number.
【单选题】Generally speaking Japanese employees do not change their job in their lifetime.
A.
Y
B.
N
C.
NG
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