—This is my brother. ---What’s _________

如图所示，是将滑动变阻器作分压器用的电路，A、B为分压器的输出端，R是负载电阻，电源电压为U保持恒定，滑动片P位于变阻器的中央，下列判断正确的是

A．空载（不接R）时，输出电压为U/2

B．接上负载R时，输出电压＜U/2

C．负载电阻R的阻值越大，输出电压越低

D．接上负载R后，要使输出电压为U/2，滑动片P须向上移动至某一位置

某饭店在年度员工满意调查中发现，饭店的薪酬存在相同岗位员工之间分配不公平的情况。该饭店要解决员工之间薪酬的公平性问题，关键应做好()这一基础工作。

A.薪酬等级 

B.编制定员 

C.绩效考评 

D.薪酬标准

用芳香烃A为原料合成某香料中间体G的路线如下

(1)A的结构简式为____________： G的结构简式为____________：      

(2)B→C的反应类型是________________________ ；E→F为消去反应；该反应的反应条件为_________________________。        

(3)写出下列转化的化学方程式：C→D______________________：E→H______________________。   

(4)E有多种同分异构体，其中的一种符合下列条件：

①分子内含有苯环，且苯环上有两个取代基；     

②核磁共振氢谱中有5个峰；     

③1mol该物质与NaOH溶液反应，最大能消耗3mol的NaOH    

该同分异构体的结构简式为_________________________。

Are you carrying too much on your back at school? I’m sure lots of children of your age will say “Yes”. Not only the students in China have this problem, but children in the United States also have heavy school bags.

Doctors are starting to worry that younger and younger students are having back and neck problems as a result of school bags being too heavy for them.

“It’s hard for me to go upstairs with my bag because it’s so heavy,” said Rick Hammond, an 11-year-old student it the US.

Rick is among students who have common school bags with two straps(带子)to carry them, but many other students choose rolling(有滚轮的)bags.

But even with rolling bags, getting up stairs and buses is still a problem for children. Many of them have hurt their backs and necks because of the heavy school bags.

But how much is too much? Doctors say students should carry no more than 10% to 15% of their own body weight(重量).

Scott Batch, a back doctor, said children under Grade 4 should stay with 10%. But it is also important that older children don’t stay with over 15%, because their bodies are still growing.“

Children are losing their balance(平衡)and falling down with their school bags,” he said.

Parents and teachers are starting to tell children to only take home library books they will be reading that night. Some teachers are using pieces of paper or thin workbooks for students to take home.

One of the best answers is, as some children said, to have no homework at all!

小题1:From the passage we can know that     .

A．only children in China carry too heavy school bags

B．children in other countries don’t carry too heavy bags

C．both children in China and the US carry too heavy school bags

D．only children in the US carry too heavy school bags小题2:Children feel it hard for them to go upstairs because      .

A．they are too young

B．their school bags are too heavy

C．they don’t know how to go upstairs

D．their parents don’t always go upstairs with them together小题3:If a child carries a heavy school bag,      .

A．his back and neck will be hurt

B．his head and arms will be hurt

C．his hands will be hurt

D．his feet will be hurt小题4:According to the doctor, Scott Batch, if a child in Grade 5 weighs(重)about 30 kilos, the school bag he carries should not be over      .

A．5 kilos

B．3 kilos

C．5.5 kilos

D．4.5 kilos小题5:Some students think the best answer to this problem is that     .

A．they should have a little homework to do after they get home

B．their teachers had better not ask them to do any homework

C．they should only take home library books they will read that night

D．they should use thin workbooks instead of think ones

US正中旁矢状面可见侧脑室，即（）

A.前角

B.体部

C.下角

D.颞角

E.后角