【单选题】【消耗次数：1】
工作误差是在额定工作条件内任一值上测得的某一性能特性的误差。
①
正确
②
错误
参考答案：
复制
纠错
相关题目
【多选题】
在抽样平均误差一定的条件下( )。
①
扩大极限误差的范围，可以提高推断的可靠程度
②
缩小极限误差的范围，可以提高推断的可靠程度
③
扩大极限误差的范围，只能降低推断的可靠程度
④
缩小极限误差的范围，只能降低推断的可靠程度
⑤
扩大或缩小极限误差范围与推断的可靠程度无关
【单选题】
在一定的抽样平均误差条件下（ ）。
①
扩大极限误差范围,会降低推断的可靠程度
②
缩小极限误差范围,可以提高推断的可靠程度
③
缩小极限误差范围,不改变推断的可靠程度
④
扩大极限误差范围,可以提高推断的可靠程度
【单选题】
在一定的抽样平均误差条件下( )。
①
扩大极限误差范围，可以提高推断的可靠程度
②
扩大极限误差范围，会降低推断的可靠程度
③
缩小极限误差范围，可以提高推断的可靠程度
④
缩小极限误差范围，不改变推断的可靠程度
【单选题】
在一定的抽样平均误差条件下（ ）
①
扩大极限误差范围，可以提高推断的可靠程度
②
扩大极限误差范围，会降低推断的可靠程度
③
缩小极限误差范围，可以提高推断的可靠程度
④
缩小极限误差范围，不改变推断的可靠程度
【多选题】
在抽样平均误差一定的条件下（）。
①
扩大极限误差的范围，可以提高推断的可靠程度
②
扩大或缩小极限误差范围与推断的可靠程度无关
③
扩大极限误差的范围，可以降低推断的可靠程度
④
缩小极限误差的范围，可以降低推断的可靠程度
【单选题】
关于DC/DC工作条件及判断下列不正确的是（）
①
高压输入范围为DC290V~420V
②
?整车处于ON电状态，蓄电池端电压在13.8~14V之间
③
?通过使用水冷进行降温。
④
?低压使能输入范围为DC 9V~14V
随机题目
【单选题】
6. I think science is ____than Japanese.
①
much important
②
important
③
much more important
④
more much important
【单选题】
5. His father began to work ____he was seven years old.
①
as old as
②
as early as
③
as soon as
④
as much as
【单选题】
13. The house is ____ small for a family of six.
①
much too
②
too much
③
very tall many
④
many very tall
【单选题】
10. It was very hot yesterday, but it is ____today.
①
even hotter
②
more hotter
③
much more hot
④
much hot
【单选题】
12. When we arrived, we found the meeting room crowded with ____ students.
①
quite a few
②
only a few
③
few
④
a few quite
【单选题】
9. These children are ____this year than they were last year.
①
more tall
②
more taller
③
very taller
④
much taller
【单选题】
1. This box is ____that one.
①
heavy than
②
so heavy than
③
heavier as
④
as heavy as
【单选题】
14. Through the window we can see nothing but ____ buildings.
①
tall very many
②
very many tall
③
very tall many
④
many very tall
【简答题】
Thousands of years ago in Egypt (埃及)， Kings built the pyramids (金字塔). They used to build them as their tombs (坟墓). The kings thought the pyramids would help them find life [填空1]death. They also wanted the world remember them as important people. Some pyramids were for queens, but they are [填空2]interesting because they are not so big. The[填空3]pyramid that we know today is the pyramid that we know today is the pyramid near Sahara ( 撒哈拉沙漠) in Egypt. It is about 5,000 years old. There are many pyramids along the Nile River (尼罗河). The largest is the pyramid of Khufu (法老胡夫). It is made of two million three hundred thousand huge stones, most of [填空4]higher than a person. It is about 144 meters high. Inside the pyramid[填空5]the burial rooms (墓室）for the king and queen and long passage (通道) ways [填空6]these rooms. The rest of the pyramid is solid (坚固的) stone. We know there were wonderful[填空7]in the pyramid. Robbers[填空8]into the pyramids and took many of these treasures (财宝). Today some of the treasures are in museums [填空9]. How did the people of ancient [填空10]build the pyramids?How did they carry and lift the huge stones? Each stone [填空11]so well and they didn’t have our[填空12]machines. Scientists[填空13]the pyramids but nobody can say just how they [填空14]. Some day if you can, you ought to go to see the pyramids. I[填空15]you that they would be amazing.1. A. beforeB. afterC. behindD. in front of2. A. moreB. lessC. noD. very3. A. eldestB. youngestC. oldestD. smallest4. A. themB. whomC. whichD. that5. A. there areB. there isC. areD. is6. A. toB. withC. forD. in7. A. treasureB. treasuresC. moneyD. gold8. A. cameB. wentC. brokeD. walked9. A. thoughB. howeverC. everD. since10. A. dayB. momentC. momentsD. days11. A. wearsB. fitsC. liftsD. carries12. A. freshB. electronicC. modernD. scientific13. A. have studiedB. will studyC. studiedD. were studying14. A. have done thatB. did soC. did itD. are doing it15. A. sureB. assureC. insureD. ensure