如图所示,电源电压保持不变,当滑动变阻器滑片P向右滑动时,电表示数的变化情况是

题型:选择题

问题:

如图所示,电源电压保持不变,当滑动变阻器滑片P向右滑动时,电表示数的变化情况是

[ ]

A、电压表V示数变小

B、电流表A1示数变大

C、电流表A2示数变大

D、电流表A1示数变小

考点:欧姆定律及其应用
题型:选择题

几乎不能通过乳腺进入乳汁的维生素是()

A.钙

B.铁

C.维生素A

D.维生素D

E.维生素B1

题型:选择题

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项, 并在答题卡上将该项涂黑。选项中有两项为多余选项。

How to be a good tourist

We travel for work but also for fun and learning. New restaurants, galleries, temples and new architecture…These places are homes for people like us who live and work there. How would you want visitors to behave in your own home? Think about it   小题1:  There are many ways of doing this without sacrificing our own holiday.

Do your homework.   小题2:  Guides will help you when you get to site, but is that the best place to go? Is it popular only because the one-day tourist can see it easily or because it is really a worthwhile place to visit? You’d better check it out.

 小题3:  Don’t go to your hotels for meals. Walk around, even if in the streets closest to your hotel. Eat in local restaurants .Talk to the locals. Learn a few in the local language and use them. You will surely get a smile from the hotel staff and street sellers .

Help preserve the sites. Most of the sites you visit may be visited by millions of people a year, so care needs to be taken to allow others to enjoy them as well. Some of these monuments are so old and fragile that they are sensitive to the touch of hands or bags and shows.   小题4:  This way, you don’t encourage the use of those plastic bags that fly all over many sites.

And here’s the big one—good manners are nearly universal.  小题5:   If that doesn’t sound like you, then give the world a break and stay home.

A.Experience the place.

B.Always have a cloth bag with you.

C.Read up on the places you want to visit.

D.Try to buy something from the local stores.E. A good tourist is polite, positive and eco-sensitive.

F. We’ve cleaned up after ourselves and taken only good memories.

G. If we are good tourists, wherever we go, we try to make it a little better because of our visit.

题型:选择题

某研究所在装运存有放射性物质的铅箱时,一只箱子从车上掉下来,王某(8岁)看见后,即取出箱中的放射性物质玩耍,结果因过量吸收放射性物质而得病。问:王某的治疗费和其他必要费用应由( )。

A.王某的监护人承担

B.某研究所承担

C.主要由某研究所承担,王某的监护人适当分担

D.主要由王某的监护人承担,某研究所适当分担

题型:选择题

SWOT分析包括:()

A、外部分析:识别机会和威胁

B、内部分析;发现优势和劣势

C、提出不同组合下的策略

D、以上都包括

E、以上都不是

题型:选择题

与性传播疾病有关的是()

A.吸烟

B.酗酒

C.吸毒

D.不洁性行为

E.工作紧张

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