问题 选择题

针对下图装置的说法中,正确是

A.溶液中pH值明显下降

B.铁片为正极,镀锌铁片为负极

C.阴极的电极反应式:Fe-2e→Fe2+

D.电子由锌经溶液流向铁

答案

答案:B

题目分析:A、锌的金属性强于铁,因此锌是负极,失去电子,铁是正极溶液中的氢离子得到电子,所以溶液中pH值明显升高,A不正确;B、铁片为正极,镀锌铁片为负极,B正确;C、原电池分为正极和负极,没有阴阳极,C不正确;D、电子由锌经导线流向铁,D不正确,答案选B。

阅读理解

阅读表达。

     Even if you really enjoy your job,it's still possible to battle boredom as you work.You may not be able

to make big changes-or change your job-but you can make small adjustments to your routine that can

make every day seem,well,a little less routine.

    1. Switch Your Seat

       Change your outlook at the office by changing your office.Ask your supervisor to help you find a

new desk.Even switching desks with a neighboring coworker can offer a fresh atmosphere.

     If it's not possible to change your location,see if you can change your desk's direction.A new view

can be just as refreshing as a new location.

     2. ________

      Start and end your day in a different way.Consider a new mode of transportation,if it's possible.Take

a subway.Ride a bike on sunny days.Carpool with a coworker.Use a new route to get to your job.You

needn't change it for ever-just long enough to help you escape the boredom

     3. Find a New Work Style

     Sick of attending that longstanding Monday morning meeting?Try to change it to the afternoon.

     If you find yourself feeling most bored in the afternoons,try to arrange to do your favorite tasks then

and tackle less desirable projects in the mornings.

     If you usually communicate with coworkers via email and instant messaging,start dealing with people

face to face.Increased communication with coworkers may help improve your mood.

      4. Get and Set a Goal

      If your work is short of objectives,it's no wonder that work has become boring.Identify a goal and

set an "achieve by" date for it.

     Your_goal_needn't_be_high_as_long_as_you_have_sufficient_enthusiasm_for_it.Perhaps you want

to make a new project.Maybe you'd like to pursue a promotion.Or you may even set a goal of finding a

new job altogether.Whatever it is,actively move toward an objective.

1. What is the purpose of the passage?(within 15 words)

________________________________________________________________________

2. Which sentence in the text is the closest in meaning to the following one?

You will feel bored when you are not working toward something.

________________________________________________________________________

3. Fill in the blank in Paragraph 5 with proper words.(within 8 words)

________________________________________________________________________

4. List three methods of escaping from boredom in your daily life.(within 5 words for each)

①________________________________________________________________________

②________________________________________________________________________

③________________________________________________________________________

5. Translate the underlined sentence in the Last Paragraph into Chinese.

________________________________________________________________________

单项选择题