男性，55岁。双下肢无力半年，右侧明显，近2个月行走不稳，右手不能扣钮扣，无外伤史，

用括号内所给动词的适当形式填空，必要时可加助动词或情态动词。

     Did you have a favorite plastic toy when you were a child? Did it break? Did your parents throw it away?

Well, I know where it is. It's floating (漂浮) in the Pacific Ocean. Well, let me explain how it 1______ (get)

there.

     Many countries put their garbage in the Pacific. Most of the garbage sinks. But plastic floats and 2______

(move). The North Pacific Gyre (环流) pulls things towards the middle. So, all the plastic ends up in the same

place. One scientist says the area looks just like "plastic soup".

     This "plastic soup" 3______ (discover) about ten years ago. Since that time the amount of plastic in his are

a 4______ (increase) a lot. And this plastic will not just go away, it takes 400 years for plastic to degrade (分

解). And, even worse, fish and sea birds are eating the plastic. They think it looks like food. The plastic doesn't

kill them directly, but the fish (who are not smart!) think they are full. So, they stop 5______ (eat) and die of

hunger. Dolphins and whales will also eat plastic and die.

     Governments are starting to work together to clean up this area, but it will take many years. That's why we

should always try 6______ (recycle) plastic... even our old toys.

1. _______ 2. _______ 3. _______ 4. _______ 5. _______ 6. _______

有一个小灯泡上标有“4.8V，2W”的字样，现在测定小灯泡在不同电压下的电功率，并作出小灯泡的电功率P与它两端电压的平方酽的关系曲线．有下列器材可供选用：

A．电压表V₁（0～3V．内阻3kΩ）：

B．电压表V₂（0～15V．内阻15kΩ）；

C．电流表A（0～0.6A，内阻约1Ω）；

D．定值电阻R₁=3kΩ；

E．定值电阻R₂=15kΩ；

F．滑动变阻器R（最大电阻10Ω，允许最大电流2A）；

G．学生电源（电动势6V，内阻不计）；

H．开关S及导线若干．

（1）实验中所用电压表应选用______，定值电阻应选用______．（填写字母序号）

（2）为尽量减小实验误差，并要求从零开始多取几组数据，画出满足实验要求的电路图．

（3）利用上述实验电路图测出的电压表读数U_V与此时小灯泡两端电压U的定量关系是______，图中四个图象中可能正确的是______．

二甘醇胺属于（）胺。

A、伯

B、仲

C、叔

D、季

一个组织的内部，按程序设置的组织机构有：（）。

A.组织内部机构的层次划分

B.组织内部机构的平行设置

C.领导者在具体的工作中，如何调配人员，结成工作的群体的活动

D.正式结构与非正式结构

轨道板铺设的固定圆锥体的锚杆钻孔孔径为20mm，钻孔深度在直线上（超高≤45mm）为（），在超高的线路上（超高＞45mm）为（）。

A、15cm，20cm

B、10cm，15cm

C、20cm，25cm