用所给词的适当形式填空。 
（1）Do you often memorize new words by____(make) vocabulary lists?
（2）–You speak English very well. Who taught you?      -Nobody, I taught____  (me).
（3）I heard the brave policeman had caught two ____( thief ) in the street by himself.
（4）My mother often practice ____ ( dance ) at home.
（5）We want to take a trip this summer somewhere in ____(east) China.

夏天，从冰箱中取出瓶装矿泉水时，会发现瓶外壁“出汗”，这是（　　）

（1 ）次氯酸的电子式：

（2 ）Cl^﹣的结构示意图：

（3 ）二氧化硅的分子式：SiO₂

（4 ）CO₂的球棍模型示意图：

（5 ）熔化时NaHSO₄的电离方程式为NaHSO₄=Na⁺+HSO₄^﹣

（6 ）乙酸的结构简式：C₂H₄O₂

（7 ）质量数为37的氯原子：¹⁷₃₇Cl．