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题目列表(包括答案和解析)

农业科技工作者在烟草中找到了一抗病基因,现拟采用基因工程技术将该基因转入棉花,培育抗病棉花品系。请回答下列问题:


⑴要使运载体与该抗病基因连接,首先应使用              进行切割。假如运载体被切割后,得到的分子末端序列为           ,则能与该运载体连接的抗病基因分子末端是    
⑵基因的“针线”是          。切割完成并连接后得到的DNA分子称为            
⑶该抗病基因在棉花细胞中表达的产物是
A.淀粉B.脂肪C.蛋白质D.核酸

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Because earthquakes happen without warning, it’s important to take steps now to prepare. Because you don’t know where you will be when an earthquake happens, prepare some supplies(急需品) for your home, work place, and car.

1.Water

A person needs at least 1/2 gallon(加仑,容量单位) of water daily just for drinking. Store at least 1 gallon of water per(每一个) person per day and be prepared for a 72 hour period. It is suggested that you buy bottled water. Keep bottled water in its original container(容器) and do not open it until you need to use it. Also, do check the “use by” date.

2.Food

It’s always a practical idea to keep a supply of non perishable(不易腐烂的) food on hand. Have an enough supply of canned(灌装的) food, powdered milk(奶粉), dried fruits, non salted nuts and canned juices for at least 72 hours.

3.Flashlights(手电筒) and spare batteries(备用电池)

Keep a flashlight beside your bed, at your place of work, and in your car. Do not use matches or candles after an earthquake until you are sure that no gas leaks(泄漏).

Prepare a battery powered(装电池的) radio and spare batteries. Most telephones will be out of order(发生故障), so radios will be your best source of information.

4.Clothes

If you live in a cold place, you must think about warmth. You might not have heat after an earthquake. Think about your clothing and bedding supplies.

根据短文内容,选择正确答案(10分)

1.Why should people prepare themselves for an earthquake?

A、Because earthquakes can be known before they happen.

B、Because earthquakes take place without warning.

C、Because earthquakes usually take place in the neighborhood.

2.About the prepared water, which description is RIGHT?

A、A person should prepare 0.5 gallon of water for one day.

B、You’d better use your own containers to keep water.

C、You shouldn’t open the bottled water until you need it.

3.You should prepare all of the following except       .

A、powdered milk

B、fresh vegetables

C、dried fruits

4.According to the article we know that        .

A、we need to prepare some supplies only at home

B、a telephone is the most important prepared thing

C、flashlights but not matches are first used after earthquakes

5.If you live in a cold place, you should prepare       .

A、some warm clothes and bedding supplies

B、some hot water

C、some batteries

 

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农业科技工作者在烟草中找到了一抗病基因,现拟采用基因工程技术将该基因转入棉花,培育抗病棉花品系。请回答下列问题:


⑴要使运载体与该抗病基因连接,首先应使用              进行切割。假如运载体被切割后,得到的分子末端序列为           ,则能与该运载体连接的抗病基因分子末端是    
⑵基因的“针线”是          。切割完成并连接后得到的DNA分子称为            
⑶该抗病基因在棉花细胞中表达的产物是
A.淀粉B.脂肪C.蛋白质D.核酸

查看答案和解析>>

Because earthquakes happen without warning, it’s important to take steps now to prepare. Because you don’t know where you will be when an earthquake happens, prepare some supplies(急需品) for your home, work place, and car.
1.Water
A person needs at least 1/2 gallon(加仑,容量单位) of water daily just for drinking. Store at least 1 gallon of water per(每一个) person per day and be prepared for a 72 hour period. It is suggested that you buy bottled water. Keep bottled water in its original container(容器) and do not open it until you need to use it. Also, do check the “use by” date.
2.Food
It’s always a practical idea to keep a supply of non perishable(不易腐烂的) food on hand. Have an enough supply of canned(灌装的) food, powdered milk(奶粉), dried fruits, non salted nuts and canned juices for at least 72 hours.
3.Flashlights(手电筒) and spare batteries(备用电池)
Keep a flashlight beside your bed, at your place of work, and in your car. Do not use matches or candles after an earthquake until you are sure that no gas leaks(泄漏).
Prepare a battery powered(装电池的) radio and spare batteries. Most telephones will be out of order(发生故障), so radios will be your best source of information.
4.Clothes
If you live in a cold place, you must think about warmth. You might not have heat after an earthquake. Think about your clothing and bedding supplies.
根据短文内容,选择正确答案(10分)
【小题1】Why should people prepare themselves for an earthquake?
A、Because earthquakes can be known before they happen.
B、Because earthquakes take place without warning.
C、Because earthquakes usually take place in the neighborhood.
【小题2】About the prepared water, which description is RIGHT?
A、A person should prepare 0.5 gallon of water for one day.
B、You’d better use your own containers to keep water.
C、You shouldn’t open the bottled water until you need it.
【小题3】You should prepare all of the following except       .
A、powdered milk
B、fresh vegetables
C、dried fruits
【小题4】According to the article we know that        .
A、we need to prepare some supplies only at home
B、a telephone is the most important prepared thing
C、flashlights but not matches are first used after earthquakes
【小题5】If you live in a cold place, you should prepare       .
A、some warm clothes and bedding supplies
B、some hot water
C、some batteries

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下面你将听到8个句子。每个句子后有三个应答语,请从每小题所给A、B、C三个应答语中选出
一个最佳选项。
(     )1.A.Nice to meet you, too.   
(     )2.A.It's Friday.             
(     )3.A.OK. Here you are.        
(     )4.A.I have a toothache.       
(     )5.A.Yes, sure.              
(     )6.A.You'll have a good time. 
(     )7.A.I hope so.               
(     )8.A.How do you like them?  
   
B.How are you?                
B.It's June, 20th.         
B.Yes. It's on Center Street.
B.I'm sorry to hear that.    
B.Yes, you can.              
B.Let's have it today.      
B.Somewhere relaxing.         
B.Never mind.    
             
C.I'm fine, thanks.                  
C.It's ten thirty.                 
C.Please hurry up.                   
C.You should see a dentist.         
C.Sorry, you can't.               
C.If you do, you'll be late.    
C.Good idea.                        
C.Well, I don't agree with
       you.   

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