用电压表测得的交流电压是()。A.最大值; B.有效值; C.平均值; D.瞬时值。

题型:单项选择题

问题:

用电压表测得的交流电压是()。

A.最大值;

B.有效值;

C.平均值;

D.瞬时值。

考点:电力负荷控制员电力负荷控制员高级技师电力负荷控制员高级技师题库
题型:单项选择题

第一节:短文填词(共10小题, 每小题1分,满分10分)

My good friend Liu Hua, _____ always worked hard, won the first place   小题1:       

in the college entrance exam in our city. She will be a     into Beijing    小题2:           

University. _____ wonderful! When she was in senior middle school, her    小题3:           

dream was to go to Beijing University and she had ____(信心) in herself.                             小题4:

She always had a good plan and knew ______ to do everyday. She kept a   小题5:           

good habit in studying. Besides, she often finished her work as _____(快)   小题6:           

as possible and never stayed up in the evening. What i      me most is   小题7:           

that she not just worked hard but also was r      to help others, so it is   小题8:       

natural that the teachers and classmates all loved her          (深深) .    小题9:           

From her story, I learned “ Chance _____ (偏爱) the prepared minds.”      小题10:         

and that “No victory comes out without price.”

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在数据库的三级模式体系结构中,模式与内模式之间的映像(模式/内模式)实现了数据库的 【6】独立性。

题型:单项选择题

关于投标文件有效期的表述中,错误的有( )。

A.如果投标人在投标文件有效期内撤回投标文件,其投标担保(保证金)将被退还

B.如果投标人拒绝招标根据需要向投标人提出延长投标文件有效期的要求,将因此被没收投标担保(保证金)

C.同意延期的投标人应相应延长投标保证金的有效期,并且因此可以提出修改投标文件的要求

D.如果投标人在投标文件有效期内撤回投标文件,其投标担保(保证金)将被没收

E.投标文件有效期为开标之日至招标文件所写明的时间期限内

题型:单项选择题

枕叶视中枢损害引起的中枢性失明,可有()

A.单纯瞳孔散大

B.光反射丧失和瞳孔散大同时存在

C.单纯光反射丧失

D.光反射不丧失,瞳孔也不散大

E.以上都不对

题型:单项选择题

为提高大便中副溶血弧菌阳性检出率,最佳运送培养液是()

A.肉汤培养基

B.咽拭子运送培养基

C.大便运送盒

D.无菌杯

E.Cary-blair运送培养基

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