如何正确使用漏电保护器？

25 ℃时，浓度均为0．3 mol/L的Na₂CO₃和NaHCO₃溶液中，下列判断不正确的是[ ]

A．均存在电离平衡和水解平衡

B．存在的粒子种类相同

C．c(OH^-)前者小于后者

D．分别加入NaOH固体，恢复到原温度，c(CO₃^2-)均增大

根据首字母或汉语提示写出下列单词，完成句子。

1. He likes reading. And he s________ much money on books last year.

2. Last night several famous film stars had supper in a Chinese r________.

3. Trains run on the r________.

4. I am going to Shanghai by plane and my friend will meet me at the a________.

5. China is the third country to send a person into s________.

6. Sorry, Miss Li. I can't write it________ (认真) again.

7. Tony lives ________ (远) from school in his class.

8. Lying on the beach is really ________ (放松).

9. Western ________ (文化) are different from those of China.

10. It was difficult to build a bridge ________ (在…之上) the wide river at that time.

女，50岁，双手指关节肿痛半年，晨僵约1小时，血沉50mm/h，X线示双手指间关节软组织肿胀和关节端骨质疏松。此时类风湿关节炎应定为哪期

A．Ⅰ期

B．Ⅱ早期

C．Ⅲ期

D．Ⅳ期

洋地黄制剂不宜应用的情况是（）

A.二尖瓣狭窄合并快心室率房颤

B.有症状心力衰竭伴窦性心动过速

C.心力衰竭伴心房颤动

D.二尖瓣狭窄窦性心率

E.急性心肌梗死伴快速室上性心律失常

下图示生物圈中部分物质的循环，A、B、C、D构成生物群落。请据图分析回答：

指出上图作为碳循环图解的不完整之处（）