下列有关有机物HO-CH=CH-COOH性质的描述：①能发生加成反应；②能发生置换反应；③能发生取代反应；④能发生氧化反应；⑤能发生水解反应；其中正确的是
A．②③④⑤
B．①②③④
C．①②④⑤
D．①③④⑤
答案：B
有机物HO-CH=CH-COOH的分子结构中有—OH具有醇的性质，又有—COOH，具有羧酸的性质，又有C=C双键，具有烯烃的性质，所以，能发生的反应有：加成反应；置换反应；取代反应；氧化反应；
Mrs. Smith has a bottle of medicine named 666 POWDER FOR COLD at home. Here is the instuction of it.
| Description: For the relief (消除) of common cold, cough, headache,fever and sore throat. Directions: Take three times after meals. You must obey the following dose(剂量) each time: Under 6 years: ask for a doctor 6—11years : 1/2 spoon = 5g 12 years or above: 1 spoon = 10g Weight: 60g each bottle Production Date: Dec. 2011 Keeping Time : 3 years Warning:1.Put in a cool , dry and clean place. Keep away from sunlight and the reach of children. 2. Don’t overdose. In case of overdose, get medical help as soon as possible. 3. Don’t take if you have heart disease, high blood pressure or you are going to give a birth. 4. Stop taking and go to ask a doctor if you feel sleepy, tired and nervous in an hour after taking. 5. Don’t keep on using over one week. |
A．The patients who have got a fever.
B．The patients who have got a cough.
C．The patients who have got a sore throat.
D．The patients who have got a heart disease.小题2:How many days can a bottle of 666 POWDER FOR COLD last for an adult patient at least?
A．One day
B．Two days.
C．Three days
D．Six days.小题3:Mrs. Smith’s baby, John, six months old, has got a cold. What do you think she should do ?
A．She should feed him 1/2 spoon of 666 POWDER FOR COLD three times a day
B．She should feed him 1 spoon of 666 POWDER FOR COLD three times a day.
C．She should take him to see a doctor and get to know what’s wrong with her son.
D．She should feed him 1/2 spoon of 666 POWDER FOR COLD only once小题4:Which of the following is NOT true?
A．Patients can take the 666 POWDER FOR COLD in February , 2015.
B．If patients take more than one spoon at a time, they need to see a doctor.
C．If patients don’t feel well after taking, they need to see a doctor.
D．Patients can’t use 666 POWDER FOR COLD for more than seven days.