选择与画线部分意思相同或相近的选项。

1.There was a clever boy called Tim.

A. named              

B. known                

C. written

2.What’s up?

A. How are you?        

B. What’s happening?      

C. What’s your name?

3.In the end, we worked out the problem.

A. At last              

B. Above all              

C. At a time

4.We were pleased to hear the good news.

A. sad                

B. happy                

C. nervous

5.He didn’t reply the question when the teacher asked him.

A. understand          

B. give                  

C. answer

下图两个装置中，溶液体积均为200mL，开始时，电解质溶液的浓度均为0．1mol/L，工作一段时间后，测得导线上都通过了0．02mol e^-，若不考虑溶液体积的变化，则下列叙述正确的是

A．在①中Cu棒为阳极；在②中Cu棒为负极

B．电极上析出物质的质量：①<②

C．电极反应式：①中阳极：4OH^-一4e^-= 2H₂O+O₂↑；②中负极：2H⁺ + 2e^- = H₂↑

D．溶液的pH：①不变；②增大