物质的性质决定物质的用途，下列描述的物质性质与其对应用途不相符的是[ ] A．浓

施工成本分析的基本方法包括（）。

A.比较法

B.表格法

C.横道图法

D.连环置换法

E.比率法

苷键的裂解反应可使苷键断裂，其目的在于了解

A．苷类的苷元结构

B．所连接糖的种类

C．所连接的糖的组成

D．苷元与苷元的连接方式

E．糖与糖的连接方式和顺序

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。

Ways to fight the flu

The flu is annoying enough on its own. In order to keep yourself from it, follow these tips.

★Get the flu vaccine(疫苗). It’s the best way to protect yourself against the flu.     1       It also helps the people around you because there’s less chance you will catch the flu and pass it on.

★Wash your hands often. Hand washing is an important way to protect against germs(细菌) like flu viruses.       2     So get in the habit of washing your hands when you come home from school, the mall, or anywhere else where you are around a lot of people.

★      3      Flu viruses travel through the air, so try to stay away from people who look sick. It’s also a good idea to avoid touching your nose, eyes, and mouth –three places flu viruses can easily enter the body.

★Cough or sneeze into a tissue(手巾纸) –not into your hands. That way, you’re not spreading the virus when you touch surfaces that other people may touch too.

★      4       You don’t want to pass your germs to someone else. And staying home is a great excuse to watch your favorite movie, play video games, or read to have a good rest.          5          

You also can fight the flu by getting enough sleep, eating healthy foods, drinking plenty of water, and getting regular exercise.

Don’t let the flu ruin your fall and winter fun. Fight back!

A．Stay home if you have the flu.

B．Keep your distance if someone is sick.

C．Rest can help the body recover faster.

D．Take some medicine as soon as you have the flu.E. It also helps protect against other germs and illnesses.

F. Getting vaccinated doesn’t just protect your own health.

G. Don’t let the flu fall at one of the most exciting times of the year.

具有松弛支气管平滑肌作用的药物是（）

A.枳实

B.大黄

C.香附

D.白及

E.陈皮

简述抒情文在语文教材中的地位。