实验室制取气体所需的装置如下图所示。
请回答以下问题。
（1）写出上图中带标号仪器的名称：①_________②_________。
（2）用高锰酸钾制取氧气时，所选用的发生装置为________（填字母序号），反应的化学方程式为 。若选用C装置收集较纯净氧气的适宜时间是 （填字母序号）。
A．当导管口刚有气泡冒出时
B．当导管口停止冒出气泡时
C．当导管口有连续均匀气泡冒出时
（3）实验室选用F装置收集二氧化碳，气体应该从 端进入，其验满的方法是——
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If you find you spend more than you make, there are only two things to do: decrease your spending or (1) . It’s often easiest to decrease expenditures, because your expenses tend to be more (2) . There are as many ways to (3) as there are people looking to save it. For example, you may pool your resources with friends, or (4) only during sales, or even live more simply. But (5) that saving money should not necessarily be an end in itself. Don’t (6) of ways to save a dime, and don’t get upset about situations where (7) to spend money. The goal is to bring your budget into balance, not to become a tightwad who keeps (8) of every penny and feels that spending money is a (9) . It is important to remember that budgets may be (10) not only by decreasing expenditures, but also by increasing income. (11) to increase income is to get a (12) if you don’t already have one.
Many students work during college. Although working adds to the (13) you will face, it does not mean that your grades will necessarily suffer. In fact, many students who work (14) than those who don’t work, because those with jobs need to be (15) . Considering part-time work is often a better (16) for dealing with budget shortfalls, than taking out a loan. Because student loans are (17) , it’s easy to use them as a crutch. Loans can be of help (18) or if you couldn’t afford to attend a college without them. If you do (19) , remind yourself: one day soon you’ll have to (20) with interest.
当发现电机有异常声响时，应检查：是否（）损坏；是否（）松动；是否转子轴向窜动
按址投递的包裹，投递日戳应加盖在包裹正面空白处。
自动（集中）抄表系统由哪几部分构成？
当工程发生需要加固补强的质量问题时，监理单位应先签发( )。
A．监理通知
B．工程暂停令
C．整改通知
D．工程变更单