问题 实验题

甲同学在某食品包装袋内,发现有一个装有白色颗粒状固体A的小纸袋,上面写着“生石灰干燥剂,请勿食用”。甲同学随手将小纸袋拿出来放在空气中,经过一段时间后,发现纸袋内的白色颗粒粘在一起成为块状固体B。请你与甲同学一起对块状固体B进行探究。

(1)取适量块状固体B加入盛有一定量水的试管中,振荡、静置、过滤,得到少量白色固体C。就白色固体C的成分,甲同学与乙同学进行讨论,一起猜想。

甲同学认为,白色固体C可能是:氢氧化钙;

乙同学认为,白色固体C可能是:碳酸钙;

你认为,白色固体C还可能是:                           。

(2)请设计实验证明你的猜想(填写下表): 

方案现象和结论
   

答案

(1)Ca(OH)2 和CaCO3的混合物

(2)

阅读理解

Generic Name: ASPIRIN

Pronunciation: ['æspərin]

Why it is prescribed (开药方):

1. Aspirin relieves mild to moderate pain.

2. It reduces fever, redness, and swelling.

3. It prevents blood from clotting (凝结).

When it is to be taken:

1. Aspirin is often taken without a prescription.

2. Follow the instructions on the label and package.

3. If your doctor prescribes aspirin for you, you will receive specific instructions for how often you should take it.

4. Keep in touch with your doctor.

How it should be taken:

1. Aspirin comes in the form of suppositories (栓剂), capsules, and regular, coated, extended-release, and chewable tablets.

2. Regular, coated, and extended-release aspirin tablets and capsules should be swallowed with a full glass of water or milk after meals to avoid stomach upset.

3. Chewable aspirin tablets may be chewed, crushed, dissolved in a liquid, or swallowed whole; a full glass of water, milk, or fruit juice should be drunk immediately after taking these tablets.

Special Instruction:

1. Children should not take aspirin for fevers associated with flu or chickenpox (水痘) because such use has been linked with a serious illness known as Reye’s syndrome.

2. Adults should not take aspirin for pain for more than 10 days (five days for children) without consulting a doctor.

3. Aspirin should not be taken by adults or children for high fever, fever lasting longer than three days without a doctor’s supervision (监管).

4. Do not give more than five doses (剂量) to a child in a 24-hour period unless directed to do so by a doctor.

5. If you miss a dose, take the missed dose as soon as you remember it and resume the prescribed schedule.

Side Effects:

1. Although side effects from aspirin are not common, they can occur.

2. Nausea, vomiting, stomach pain, indigestion and heartburn are common. Take aspirin after meals, with a full glass of water or milk. If these effects continue, contact your doctor.

3. Ringing in the ears, bloody or black stools (粪便), difficulty breathing, dizziness, mental confusion and sleepiness are rare. Stop taking the drug and contact your doctor.

Other Precautions:

1.  If you are pregnant or breast-feeding women, inform your doctor before taking aspirin.

2.  Do not take aspirin if you are within three months of delivery.

3.  Do not take aspirin if you are allergic (过敏) to it.

4.  If you have diabetes (糖尿病), regular use of eight or more regular strength aspirin tablets a day may affect test result.

5.  If you are taking large doses of aspirin on a long-term basis, avoid having alcoholic drinks because alcohol can increase stomach problems.

6.  To prevent an overdose of aspirin, read the labels before taking other pain relievers and cold products to be sure that they do not contain aspirin.

Storage Conditions:

1. Store aspirin in a cool place or in a refrigerator.

2. Throw away aspirin that smells strongly of vinegar.

3. Keep this aspirin out of the reach of children. 

小题1:Which of the following about Aspirin is correct?

A.It only comes in the form of regular tablets.

B.It should not be taken for more than 5 days for children.

C.It can be used to reduce fever and pain and prevent blood clotting.

D.It causes ringing in the ears or difficulty breathing after being taken小题2:If you start taking aspirin, you should do all the following things EXCEPT ________.

A.keeping in touch with your doctor

B.taking aspirin tablets after meals to avoid stomach upset

C.drinking a full glass of juice immediately after taking chewable aspirin tablets

D.taking more than 8 regular strength aspirin a day while suffering from diabetes小题3:The underlined word “resume” most probably means ________.

A.continue

B.make up

C.pause

D.throw away小题4:Which of the following might be a side effect caused by Aspirin?

A.blood clotting

B.stomach upset

C.lasting fever

D.sight problem小题5:Where can we probably come across such a text?

A.In a research paper.

B.In the package of a medicine

C.In a medical textbook.

D.In a scientific and technological magazine

单项选择题 A1/A2型题