[判断题]当导体温度不变时,通过导体的电流与导体两端的电压成正比,与其-我要搜题网

[简答题] We use language primarily as a means of communication with other human beings. Each of us shares with the community in which we live a store of words and meanings as well as agreeing S1.______ conventions as to the way in which words should be arranged to S2.______ convey a particular message; the English speaker has in his dis- S3.______ posal a vocabulary and a set of grammatical rules which enables S4.______ him to communicate his thoughts and feelings, in a variety of styles, to the other English speakers. His vocabulary, in particular, S5.______ both that which he uses actively and that which he recognises, in- creases in size as he grows old as a result of education and S6.______ experience. But, whether the language store is relatively small or large, the system remains no more than a psychological reality for the indi- vidual , unless he has a means of expressing it in terms able to be seen b

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[多选题]桨距调节速度过慢会导致（）。(2.0分)
A.发电机过电流
B.发电机过功率
C.缩短变桨机构寿命
D.烧毁发电机

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[单选题]下面程序的运行结果为()
#include
Void main()
{
int s,k;
For(s=2,k=2;k<5;k++)
S+=k;
Printf("%d\n",s);
}
A.1
B.9
C.10
D.11

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[单项选择]

法律和道德是相辅相成、相互促进的，但二者不能相互代替，其不同点表现为（）
①产生时间不同
②调节手段不同
③调节方式不同
④调节范围不同
⑤作用大小不同

A. ①②③④⑤
B. ①②③④
C. ①③④⑤
D. ②③④⑤

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[多选题]钢筋间距和保护层厚度检测时，应根据钢筋设计资料，确定检测区域内钢筋可能分布的状况，选择适当的检测面，检测面应（）。
A.避开金属预埋件
B.粗糙
C.清洁
D.平整

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[单项选择]镦粗头不得有与钢筋轴线相（）的横向裂纹
A. 垂直
B. 平行
C. 交叉
D. 重合

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[单选题]对处于系统末端、短路容量较小的供电区域，可通过( )方式，增加系统的短路容量，提高配电网的电压稳定性。
A.主变分列运行
B.线路加串抗
C.增大主变容量
D.配电网开环运行

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[简答题]何谓冷滤点？

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[不定项选择题]共用题干第二篇

Natural Medicines

Since earliest days,humans have used some kinds of medicines.We know this because humans have
survived.Ancient treatments for injury and disease were successful enough to keep humans from dying out
completely.
They were successful long before the time of modern medicine.Before the time of doctors with white
coats and shiny（发亮的）instruments. Before the time of big hospitals with strange and wonderful equipment.
Many parts of the world still do not have university-educated doctors. Nor do they have expensive hospi-
tals.Yet injuries are treated.And diseases are often cured.How?By ancient methods.By medicines that
might seem mysterious , even magical（有魔力的）.Traditional medicines are neither mysterious nor magical,
however.
Through the centuries, tribal（部族的）medicine men experimented with plants. They found many use-
ful chemicals in the plants.And scientists believe many of these traditional medicines may provide the cure
for some of today's most serious diseases.
Experts say almost 80% of the people in the world use plants for health care.These natural medicines
are used not just because people have no other form of treatment.They are used because people trust them.
In developed areas,few people think about the source of the medicines they buy in a store.Yet many wide-
ly-used medicines are from ancient sources,especially plants.Some experts say more than 25% of modern
medicines come,in one way or another,from nature.
Scientists have long known that nature is really a chemical factory.All living things contain chemicals
that help them survive.So scientists' interest in traditional medicine is not new.But it has become an ur-
gent concern.This is because the earth's supply of natural medicines may be dropping rapidly. It can be seen from the passage that the earth's supply of natural medicines________.
A.may never be exhausted
B.may be dropping rapidly
C.is surprisingly big
D.is as rich as ever

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[单项选择]促进幼儿心理发展的最好活动形式是（）。
A. 学习
B. 游戏
C. 劳动
D. 手工

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[单项选择]一级高血压是指（）
A. 收缩压140～149mmHg，舒张压85～89mmHg
B. 收缩压140～149mmHg，舒张压90～99mmHg
C. 收缩压140～159mmHg，舒张压85～89mmHg
D. 收缩压140～159mmHg，舒张压90～99mmHg
E. 收缩压160～179mmHg，舒张压90～99mmHg

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[单选题]工作许可人在接到所有工作负责人（包括用户）的终结报告，并确认所有工作已完毕，所有（）已撤离，所有接地线已拆除，与记录簿核对无误并做好记录后，方可下令拆除各侧安全措施。
A.工作许可人
B.小组负责人
C.工作票签发人
D.工作人员

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[判断题]当导体温度不变时,通过导体的电流与导体两端的电压成正比,与其电阻成反比。 ----
A.正确
B.错误

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[判断题]当导体温度不变时,通过导体的电流与导体两端的电压成正比,与其电阻成反比。 ----A.正确B.错误

热门试题:

[判断题]当导体温度不变时,通过导体的电流与导体两端的电压成正比,与其电阻成反比。 ----
A.正确
B.错误