一块三角形菜地，底为25米，高为19.4米，如果每平方米种8棵白菜．这块菜地可种

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。（如果所用的答题卡没有E、F、G选项，则选E涂A、B，选F涂A、C，选G涂A、D。）

Every student has tests when they are at school. But have you ever been so worried about the tests that you can’t fall asleep at night? Have you ever felt sick or had a headache during a test?  小题1:__  This worry in your mind can make your body feel bad. You may feel angry, frustrated, scared, or afraid, which can give you a stomachache or a headache.

小题2:__ Good or normal stress might happen when you are called to answer a question in class or when you have to give a speech. This kind of stress can help you to get things better done.  小题3:__

But bad stress can happen if the stressful feelings keep going over a long time. You may not feel well if your parents are fighting, if a family member is ill, if you are having problems at school, or if you are going through anything else that makes you upset every day.  小题4:__

小题5:__  That means making good decision about how to spend your time. If you are only dealing with school stuff and have no time to play, you can get stressed. Make sure you keep your SELF in mind: Sleep, Exercise, Leisure and Food. If you take care of yourself and get enough sleep and food, and if you exercise and leave time for fun stuff, you will probably be less stressed out!

A．However, there are two different kinds of stress.

B．Can you tell a kind of stress from another one?

C．The best way to keep stress away is to have a balanced life.

D．That kind of stress isn’t going to help you, and it can actually make you sick.E. Since bad stress is harmful to us, you’d better try to change it into good stress.

F. If so, then you know what stress is. Stress is what you feel when you are worried or uncomfortable about something.

G. For example, you may do a better job on your test if the stress pushes you to prepare well before the test.

铁是我们日常生活中常见的金属．

（1）根据如图回答问题．

①Fe₂O₃中铁元素的化合价是______．

②可观察到澄清石灰水中的现象是______．

③点燃酒精灯的目的是______．

④高温条件下此反应的化学方程式是______．

（2）金属铁能在氧气中剧烈燃烧，小明对“铁丝在氧气中燃烧为什么会火星四射”进行如下探究．下表是他将纯镁条和不同含碳量的铁丝（镁条和铁丝直径均为0.4mm）放入氧气中燃烧时的实验现象记录如下．请你分析回答：

	镁 条	含碳0.05%的铁丝	含碳0.2%的铁丝	含碳0.6%的铁丝
燃烧时的现象	剧烈燃烧，发出耀眼白光，无火星	剧烈燃烧，极少火星	剧烈燃烧，少量火星	（未填）

①铁在氧气中燃烧的化学方程式为______；

②你认为表中“未填”的实验现象是______；

③分析上述实验现象，你认为造成铁丝在氧气中燃烧时产生火星四射的主要原因可能是______．

湖南省考生小王于2006年开始参加全国注册会计师考试，到2008年12月为止取得了全部5门课程的单科合格证，假定现在是2009年3月。以下说法正确的是( )。

A．小王可以持全部5门课程的单科合格证到中注协换取全科合格证书

B．小王可持全科合格证书到湖南省注册会计师协会办理晋升高级职称的手续

C．小王可持全科合格证书到湖南省注协注册部领取执业注册会计师证书

D．取得全科合格证后，小王未到事务所实习也可领取注册会计师证书

主要发供电设备被迫停止运行、非计划检修或停止备用，未构成事故者，应定为（）。

A、二类障碍

B、异常

C、一类障碍

以下哪一个不是信息的安全级别（）

A.普通级

B.秘密级

C.机密级

D.绝密级