问题 选择题

下列对摩尔(mol)的有关说法中错误的是

A.摩尔是一个单位而非物理量

B.摩尔既能用来计量纯净物,又能用来计量混合物

C.1mol任何气体所含气体的分子数目都相等

D.0.5mol氦约含有1.204×1024个电子

答案

答案:D

题目分析:A.摩尔是物质的量的单位,不是非物理量 。正确。B.摩尔是衡量微观粒子的单位,可以用来计量纯净物,也可以用来计量混合物。正确。C.任何气体都是由分子组成的。气体的物质的量相等,则所含气体的分子数目都相等。正确。D.氦是2号元素,每个He原子含有2个电子,而氦分子是单原子分子,即每个原子就是一个分子。故0.5mol氦约含有6.02×1024个电子.错误。

名词解释
阅读理解

Saturday, March 24th

We have arrived in the hot, wet city of Bangkok. This is our first trip to Thailand(泰国). All the different smells make us want to try the food. We are going to eat something special for dinner tonight. The hotel we are staying in is cheap, and very clean. We plan to stay here for a few days, visit some places in the city, and then travel to Chiang Mai in the North.

Tuesday, March 27th

Bangkok is wonderful and surprising. The places are interesting. We visited the famous market which was on water, and saw a lot of fruits and vegetables. Everything is so colorful, and we have taken hundreds of photos already! Later today we will leave for Chiang Mai. We will take the train north, stay in Chiang Mai for two days, and then catch a bus to Chiang Rai.

Friday, March 30th

Our trip to Chiang Rai was long and boring. We visited a small village in the mountains. The village people here love the quiet life—no computers or phones. They are the kindest people I have ever met. They always smile and say“hello”. Kathy and I can only speak a few words of Thai, so smiling is the best way to show our kindness. I feel good here and hope to be able to come back next year.

小题1:The diaries above show the writer’s __________________ days in Thailand.

A.3

B.7

C.15

D.8小题2:It seems that visitors ______ in Bangkok.

A.often feel hungry

B.can’t take any photos

C.can have a good time

D.feel a little bored小题3:Which of the following is TRUE?

A.Chiang Mai is a beautiful city in the south of Thailand.

B.The writer left Chiang Mai for Chiang Rai by bus.

C.The writer is traveling alone in Thailand.

D.The writer will take a bus to Chiang Mai.小题4:The people in the village _______________________.

A.are friendly to others

B.like to speak English

C.hope to live in the cities

D.live a very busy life小题5:What is the best title(标题)for the whole diary?

A.My First Travel

B.The Outside World

C.Traveling in Thailand

D.My Trip to Chiang Mai