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问题 选择题

被称为毒品之王的海洛因化学式为C21H25O5N．下列关于海洛因的说法错误的是（　　）

A．属有机物

B．焚烧产物只有CO2和H2O

C．稍一吸食就会成瘾

D．长期吸食易感染肝炎、艾滋病

答案

A、根据海洛因化学式为C21H25O5N可知含有碳元素，所以属有机物，故A正确；

B、化学反应前后元素的种类不变和海洛因化学式为C21H25O5N可知，焚烧产物除CO2和H2O外，还应该含有含氮元素的物质，此外含碳元素的物质完全燃烧生成二氧化碳，不完全燃烧生成一氧化碳，所以焚烧产物不只有CO2和H2O，故B错误；

C、海洛因千万不能试，稍一吸食就会成瘾，故C正确；

D、海洛因会损害人的神经系统，降低人体免疫功能，使心肺受损，长期吸食易感染肝炎、艾滋病，故D正确．

故选：B．

阅读理解

Everyone hopes to have a healthy lifestyle. But do you know what a healthy lifestyle is like? Here are some ways that lead to(导致) a healthy lifestyle.

Get active(积极的)

This is the most important way of a healthy lifestyle. Walking, running and playing basketball and other sports will help you keep healthy.

If your job needs long hours of sitting, get up often and walk. Don’t let laziness(懒惰) stop your body and mind. Be active at your workplace, around your neighborhood(邻近地区) and wherever(无论那里) possible.

Keep clean

Keep the places around you clean. Cleanliness(清洁)can create(创造) a healthy lifestyle. Unclean(不干净 ) and untidy(不整齐) places can not only make you angry but also make you ill.

Eat healthily

Our health depends on(依赖于)our food, so everyone should remember to eat healthy food. The healthier food you eat, the healthier you will be.

Live green

This is the easiest way to live a healthy lifestyle. Plant trees around your house. Try your best to save water. Stop using things that are bad for the environment.

小题1:Which is the most important way to have a healthy lifestyle?

A．Living green.

B．Keeping clean.

C．Eating healthy.

D．Getting active.小题2:How many ways does the passage tell the people to have a healthy lifestyle?

A．Two.

B．Three.

C．Four.

D．Five.小题3:Which is the easiest way to live a healthy lifestyle?

A．Getting active.

B．Living green.

C．Keeping clean.

D．Eating healthy.小题4:What does the underlined word “environment” mean in Chinese?

A．空气

B．矿藏

C．环境

D．垃圾小题5:How will unclean places make people feel?

A．Excited.

B．Sad.

C．Happy and healthy.

D．Angry and ill.
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单项选择题

溃疡性睑缘炎的治疗方法错误的有

A．局部滴用广谱抗生素滴眼液，涂抗生素眼膏及磺胺眼膏
B．除去脓痂及已经松落的睫毛，使毛囊中的脓液得以引流
C．每周一次用生理盐水或3％硼酸溶液清洗睑缘部、
D．除去各种诱因，注意个人卫生
E．炎症完全消退后，应持续治疗至少2～3周，以防复发
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