下列哪些情况可导致钠石灰不发热（） A.紧闭吸入麻醉 B.钠石灰失效 C.新

转酮醇酶的辅酶是（）

A.NADP

B.NAD

C.FAD

D.FMN

E.TPP

With more and more farmers working in big cities, their children go into the cities, too.However, problems appear. One of these problems is that is difficult for these children to receive education in cities.

Luckily, there are some free schools for them, but they are not enough. Ten-year-old Li Xin is one of the lucky girls who get a chance to study in one of these schools. She is very happy. She studies in a school specially for migrant workers’（外来务工人员的）children. For children like Li Xin who don’t have enough money, these free schools are their best choice, because they have free classes, textbooks, uniforms and meals in the schools.

But there is a long way to go. The free schools for children from migrant workers’ families are not enough because to run such a school is not easy and needs lots of money. A school officer said they needed at least one million yuan to run the school. “Luckily, some people and companies donate（捐赠）money, used books and a lot of other things to help us. There are also some volunteers teachers,” he added.

Anyhow, we must try to give these children an equal（平等）chance to get better education so that we can make our society harmonious（和谐的）.

小题1:From the passage, we know that Li Xin’s parents used to be __________.

A．workers

B．teachers

C．officers

D．farmers小题2:The school provides Li Xin with the following things free except_____.

A．textbooks

B．uniforms

C．computers

D．meals小题3:What does the underlined word “run” mean in Chinese in the passage?

A．奔跑

B．经营

C．考虑

D．收购小题4:The passage mainly talks about__________.

A．what jobs migrant workers can do in big cities

B．the development of big cities

C．helping migrant workers’ children go to school

D．what difficulties those free schools face now

若函数f（x）=log_a（x+1）（a＞0，a≠1）的定义域和值域都是[0，1]，则a等于______．

下列属于在建筑物内用铅直线原理将轴线铅直投测到施工层的是（）。

A.吊线锤法

B.激光铅直仪法

C.延长轴线法

D.正倒镜挑直发

从地面以大小为v₁的初速度竖直向上抛出一个小皮球，经过时间t皮球落回地面，已知皮球在运动过程中受到空气阻力的大小与速度的大小成正比，重力加速度大小为g．下面结论正确的是（　　）

A．皮球上升克服重力做功的平均功率大于下降重力做功的平均功率

B．皮球上升克服阻力做功小于下降克服阻力做功

C．皮球下降动能增加量大于上升动能减少量

D．皮球上升中动能与势能相等的位置低于下降中动能和势能相等的位置