当电源和负载未构成闭合回路时,该电路称为断路状态;若电源两端被电阻接近零的导体接通时

题型:填空题

问题:

当电源和负载未构成闭合回路时,该电路称为断路状态;若电源两端被电阻接近零的导体接通时,这种情况叫做电源被()。

考点:电气值班员考试电气值班员考试题库
题型:填空题

水螅的身体一端附着在______上,另一端伸展着5~12条柔软细长的______,另外还有一种较为特殊的结构称为______,帮助捕捉食物.

题型:填空题

已知有酒窝和无酒窝是一对相对性状,一对夫妇的基因型都是Aa,那么,他们的子女的基因型可能是(   ) 

A、aa    B、AA、Aa、aa    C、 Aa、aa    D、 AA、Aa

题型:填空题

根据MLC公约,海员就业协议均应包括()等细节。

Ⅰ.船东的名称和地址;

Ⅱ.订立就业协议的地点及日期;

Ⅲ.海员将担任的职务;

Ⅳ.海员的工资数额。

A.Ⅰ~Ⅳ

B.Ⅱ~Ⅳ

C.Ⅰ,Ⅱ,Ⅳ

D.Ⅰ~Ⅲ

题型:填空题

阅读理解。

     In the US and Britain, the slogan around colleges was "Save water. Shower with a friend." Now, Wuhan

University has come up with another system for the campus bathhouse. It charges students for the amount

of time in a shower. Before entering the bathhouse, students pay for the amount of time they want in the

shower with cash or their student ID card. The clock starts ticking the minute the tape is turned on. It pauses

when a button is pressed for soap. An integrated circuit (IC) card reader at each tap shows the time. No

money, no water. The benefits of the new system can be seen with the old system, which charged Yuan for

each person regardless of time in the shower. The university used about 320 tons of water daily under the old

system, but only 60 tons now.

     Many students use the new system but opinions on it are divided. Some students say it is bad because

bathing had become a sort of race. Many people using it for the first time are not sure how long they need to

shower. Some might be embarrassed if their time is up and they're still covered in soap. They have to ask the

bathhouse worker to help them buy extra time.

     "It's a flaw in the system that you can not buy extra time on the ID card," said Ren, a freshman in Wuhan

University. The university is also considering some students' suggestions that they be allowed to pay after

they've finished the shower. Not surprisingly, some are complaining about losing the hour shower. But many

students say the move helps them develop a water-saving sense.

    Without the time limits, most students tended to shower for 30 to an hour in the bathhouse.

     Some even used the hot water to wash their clothes."In my experience, 0-20 minutes is enough," said Dai

Zhihua, a third-year student who usually takes 8 minutes.

     A similar system has been installed in other universities. Shanghai Normal University introduced it at its

Fengxiang Campus in September. The bathing fee there is 0.2 Yuan per minute. One male student responded

by setting a record with a two-minute shower.

1. According to the passage, which of the following is NOT true?

A. Students pay for the amount of time they want in the shower.

B. The clock times all through while the student is bathing except when the bather paused for soap.

C. If money runs out, there will be no water.

D. Having finished bathing, the student has to pay for it.

2. The underline word "flaw" (Paragraph 3) most probably means ______.

A. fault

B. advantage

C. pity

D. perfection

3. Since the new system has performed, ______ of water can be saved.

A. a quarter

B. one third

C. one half

D. two thirds

4. It can be inferred from the passage that ______. 

A. The new operation can raise students' environmental awareness.

B. the new operation can solve the water crisis.

C. a similar operation has been set in other universities.

D. The university has saved a lot of water by using the new system.

5. In which column can you find this passage?

A. People.

B. Society.

C. Campus Life.

D. Lifestyle.

题型:填空题

青稞灌溉定额是指青稞生长期内灌溉需水量的总和,通常用灌水的水层深度来衡量,下图示意我国部分地区青稞灌溉定额的空间分布,读图完成下列各题。

为了降低噶尔县的青稞灌溉定额,最可行的措施是()

A、推广秸杆覆盖

B、兴修灌溉水渠

C、搭建塑料大棚

D、减小生产规模

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