①写出标号g的仪器名称：____；

②用氯酸钾和二氧化锰制氧气选用的发生装置是____(选填序号)，反应的化学方程式为____；用向上排空气法收集氧气，检验氧气是否收集满的方法是____；

③用B装置加入双氧水和二氧化锰制氧气，使用分液漏斗的优点是____；若用D装置收集氧气，当____时，才能将导管伸入集气瓶中进行收集；

④取一定质量分数的过氧化氢溶液34g于烧杯中，加入一定量的二氧化锰，完全反应后，称得烧杯内剩余物质的总质量是33.8g，将杯内剩余物质过滤、洗涤、干燥后得滤渣3g。请根据要求回答下列问题：

a．生成氧气的质量是____g；

b．所取溶液中过氧化氢的物质的量是____？(请根据化学方程式计算)

⑤F装置可用来测量生成的O₂ 的体积，检验该装置气密性的方法是：当把针筒里的活塞向左推时，若看到____,说明气密性良好；

⑥实验室可用B或C装置制备二氧化碳，反应的化学方程式为____，C相对于B装置的优点是____。若用E装置收集二氧化碳，气体应从____端通入(选填“a”或“b”)；

⑦实验室也可以用A 装置制备二氧化碳，推测其反应物是____。

A.NaHCO₃ 固体     B.大理石与稀盐酸      C.木炭与氧气

—My brother and I will go to Taiwan tomorrow.

—_______. Shall we go together?

根据短文内容简要回答下列问题。

    Do you like drinking coke, coffee, juice or milk? Do you often drink them instead of water? However, of all the things we eat and drink, water is the most important. Not all of us understand this but it is quite true. Human body can go without food for a long time, but two or three days without water usually makes people die.

    Many people do not understand how much water the human body needs to work well. What is true is that many people do not drink enough, especially in hot weather. Most people drink only when they are thirsty but often need more water after they take exercise.

    Does anyone know what is the 65%-75% of human body? It is water. If we do not have enough water, we will feel tired and become ill. So, do you know what the best drink is? It's water.

空气是一种宝贵资源．下列有关空气的说法正确的是（　　）