（）是现代桥梁建设和发展的必然趋势。 A.桥梁施工监控 B.桥梁施工监测 C.桥梁施

读短文，回答后面的问题。

       Some things can carry messages, for example, a sign at the bus stop helps you to know which bus to

take. Signs on the door tell you where to go in or out. Have you ever noticed that there are a lot of signs

around you and that you receive messages from them all the time?

       People can communicate in many other ways. An artist can use his drawing to tell about beautiful

mountains, about the blue sea and many other things. Books are written to tell you about all the wonderful

things in the world and also about people and their ideas.

       Books, magazines, TVs, radios and films all help us to communicate with others. They all help us to

know what is going on in the world and what other people are thinking about.

1. What can help you if you want to know which bus to take?

_______________________________________________

2. What do the signs on the door do?

_______________________________________________

3. People can communicate in many other ways, can't they?

_______________________________________________

4. What can help us to communicate with others?

_______________________________________________

5. What do they help us to do?

_______________________________________________

常温下，将某一元酸HA和NaOH溶液等体积混合，两种溶液的浓度和混合后所得溶液的pH如下表：

请回答：

（1）从①组情况分析，HA是强酸还是弱酸？____________(填“强酸”或“弱酸”)。

（2）②组情况表明，c____________0.2 mol/L(选填“大于”．“小于”或“等于”)。混合液中离子浓度c(A^-)与c(Na⁺)的大小关系是___________。

（3）从③组实验结果分析，说明HA的电离程度____________NaA的水解程度(选填“大于”．“小于”或“等于”)，

目前市场上主流手机所配的电池基本上都是锂离子电池。它的负极材料是金属锂和碳的复合材料，组成为C₆Li，其中碳作为金属锂的载体，电解质为一种能传导Li⁺的有机导体或高分子材料。这种锂离子电池的电池反应式为：下列说法不正确的是 

A．放电时电池内部Li⁺向负极移动

B．该电池不能选用水做溶剂的电解质

C．放电时，正极的电极反应式：0.45Li⁺+Li_0。55CoO₂+0.45e^-LiCoO₂

D．充电时，外接电源的正极与电池上标注“+”的电极连接

某人因有机磷农药中毒，致使神经纤维末梢释放的乙酰胆碱不能失活而作用加强。患者不会出现下述哪一症状

A．消化道运动增强，腹痛、腹泻

B．瞳孔缩小，视力模糊

C．肌肉震颤

D．皮肤干燥，无汗，

影响轴突再生的因素包括（）

A.神经纤维类型

B.神经损伤类型

C.失神经时间的长短

D.年龄

E.个体差异