试题与答案

根据电场强度的定义式E=可知,电场中确定的点 A.电场强度与试探电荷受到的电场力

题型:选择题

题目:

根据电场强度的定义式E=可知,电场中确定的点

A.电场强度与试探电荷受到的电场力成正比,与试探电荷的电荷量成反比

B.试探电荷的电荷量q不同时,受到的电场力F也不同,场强也不同

C.试探电荷的电性不同,受到的电场力的方向不同,场强的方向也不同

D.电场强度由电场本身决定,与是否放置试探电荷及试探电荷的电荷量、电性均无关

答案:

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阅读下列有关材料,回答问题。

材料一:从1988年联合国大会通过保护气候的决议以来,经历了21年马拉松式的国际气候变化谈判,2009年12月7日—18日在丹麦首都哥本哈根召开大会。哥本哈根会议,即《联合国气候变化框架公约》第15次缔约方会议暨《京都议定书》第5次缔约方会议,被喻为“拯救地球最后的机会”,其主题为“气候变化”。

(1)当今世界气候变化的主要表现是什么?要解决全球气候变化需要遵循可持续发展的原则是什么?

材料二:部分国家人均温室气体排放量

(2)为什么在大气环境保护方面发达国家应承担更多的义务?

材料三:2009年11月25日,中国政府正式公布了控制温室气体排放的行动目标,2020年中国单位国内生产总值二氧化碳排放比2005年下降40%—45%。

(3)请你为减少温室气体排放量提出合理措施。

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题型:多项选择题 案例分析题

患者男性,52岁。间歇发作上腹部疼痛15年,加重1周入院。患者于15年前出现上腹部隐痛,进食后可缓解,当时未予以重视,患者近1周前出现上腹部疼痛加重,伴呕吐症状,呕吐物为宿食、量多,未见血块,无黑便,无咳嗽、气促、发热,体重减轻2kg。

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题型:单项选择题

Letter A

Dear Rose,

I like your programmes very much. I’m now writing to ask you something about American social customs. My American friends want me to join them in their dinner party. I am very happy and have decided to go, but I’m a little worried about it, too. The social customs in my country are very different from here, so I’m afraid of making mistakes.

Should I bring a present, such as sweets or flowers Should I arrive on time or a little late At the dinner table, how can I know which fork or knife to use How can I let the family know that I’m thankful for their kindness

Wang Lin

Letter B

Dear Wang Lin,

It’s a good idea to bring a small present when you go to a dinner party. Flowers are always nice, or you may bring a bottle of wine if you know that your friends drink it.

You should arrive on time or five to ten minutes late. Don’t get there early. If you’re going to be more than fifteen minutes late, you should call and tell them.

Try to be free at the dinner table. If you don’t know about choosing the right fork or knife, just watch the other people, and follow them. If you still have no idea of what to do, ask the person next to you.

If you like the food, say so. Of course, you’ll thank them for the meal and for their kindness. It’s also a good idea to send a thank you card the day after.

Rose

Which of the following is NOT proper for joining in a dinner party()

A.Get there 15 minutes earlier.

B.Make yourself at home.

C.Follow others to use forks and knives.

D.Thank your friends for the meal.

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