PN结具有()单向导电性特性,即()导通,()截止。 A.选择,低压,高压 B.选择

题型:单项选择题

问题:

PN结具有()单向导电性特性,即()导通,()截止。

A.选择,低压,高压

B.选择,高压,低压

C.单向,反向,正向

D.单向,正向,反向

考点:医院设备科医院设备科题库
题型:单项选择题

数值孔径(numerical aperture)

题型:单项选择题

监督检查不正当竞争行为的国家机关工作人员徇私舞弊,对明知有违反《反不正当竞争法》的规定构成犯罪的经营者故意包庇不使他受追诉的,依法追究( )。

A.民事责任
B.经济责任
C.刑事责任
D.行政责任

题型:单项选择题

第四部分:写作(共三节)

短文改错(共10小题;每小题1分,满分10分)

Helen is one of my best friends. She had taught                     76. _________

us English when I attended training class two                               77. _________

years before. Helen always made good preparations                      78. _________

for the lesson, and she tried her best to make                                79. _________

her classes lively. I used to being poor in English,                         80. _________

especially in written English. But now I'm able                          81. _________

to write English letters and reports correct.                                   82. _________

I still remember how she helped me for my                               83. _________

English patiently. Teachers' Day's come. I'm going to                      84. _________

send to her a card and give her best wishes.                              85. _________

题型:单项选择题

在施工图设计阶段,编制施工图预算时采用的是( )。

A.预算定额

B.概算定额

C.概算指标

D.企业定额

题型:单项选择题

螺纹标记M20-6H表示()。

A.普通细牙螺纹

B.普通粗牙螺纹

C.左旋

D.右旋

E.旋合长度长度为S

F.旋合长度为N

更多题库