下图表示某植物细胞的部分结构和相关代谢中发生的气体转移情况，有关的正确叙述是（） A

一个电流计的满偏电流I_g=100μA，内阻为600Ω，要把它改装成一个量程为0.6A的电流表，则应在电流计上

A．串联一个5.4kΩ的电阻

B．串联一个约0.1Ω的电阻

C．并联一个约0.1Ω的电阻

D．并联一个5.4kΩ的电阻

预防电加热设备火灾的措施有（）。

A、运行中的电加热设备需有专人监视，周围不得有易燃物，电加热设备必须安装在不燃烧、不导热的基座上；

B、合理选择电源线及开关、熔断器；

C、注意运行时间；

D、防止过负荷和短路引起的火灾。

Starting a new school term is always exciting. It is a chance to see all of your friends again. But most exciting of all, the new term is an opportunity to take up new hobbies. As you know, it is common in Britain for students to take up new hobbies after the Christmas holidays. Promising to begin something new is a common New Year resolution for many school teenagers.

Most schools offer different kinds of hobby classes. Students take them in their free periods or after school. Some classes you have to pay for and others are free of charge. For example, I once took a free Wednesday evening gymnastics class that my school offered. But when I learnt how to play the drum my parents had to pay for the lesson, and they did so, like most parents, without any complaint.

The most popular extra classes at my school were piano lessons and drama club:  Both classes offered exams students could take. Because the extra classes may take up much time of the students, students with many hobbies sometimes felt more stressed than those without any. But they could enjoy their life better than those who didn't foster (培养) any hobbies at school. For example, they could build up good friendship with the persons who shared the common interest with them. Most important of all, the students with hobbies left school with many extra skills.

Frankly speaking, I haven't continued any of the hobbies I began at school. But I have never regretted taking them. After all, my best friend today is someone whom I met in my gymnastics class. The reason why we are still keeping in close touch with each other is that we have much in common.

小题1:The first paragraph suggests that it's children's nature          .

A．to value friendship

B．to make a promise easily

C．to copy others' behavior

D．to be curious about the new小题2:The author's parents' attitude to hobby classes might be that of         .

A．approval

B．doubt

C．unconcern

D．disapproval小题3:What is the biggest benefit children can get from taking up a new hobby?

A．They can enjoy a good time.

B．They can learn extra skills.

C．They can make more friends.

D．They will have things to share.小题4:From the author's experience, we can learn that          .

A．free hobby classes are very popular

B．hobbies are a way of making friends

C．we must be careful when choosing a hobby

D．hobby classes may not last a long time小题5:What is the purpose of the passage?

A．To introduce some hobby classes at school.

B．To tell readers how to choose hobby classes.

C．To encourage readers to take up new hobbies.

D．To report a trend among British school children.

可靠性数据填报必须遵循“三性”原则，即及时性、准确性、完整性。

简述文学中的语言的特点。