问题 单项选择题

丝裂霉素C可使体细胞染色体断裂而形成突变,其后果可能导致

A.基因负荷增加

B.生育功能障碍

C.遗传性疾病

D.胚胎综合征

E.动脉粥样硬化

答案

参考答案:E

解析: 本题考查重点是体细胞突变的后果。选项A、B、C、D均为生殖细胞突变的后果,只有动脉粥样硬化是体细胞突变可能导致的后果。

选择题
完形填空

A green life sometimes just needs a good idea like sharing cars.It’s a new way of thinking.You can use a car but you don’t need to own it Now the idea of “car sharing” has become       in many countries.

As we know ,most cars       in garages for much time.In fact,we drive our own cars          one or two hours a day on average(平均).    When we don’t use them,we have to pay for parking and        things.That costs too much money.To       money,some people come up with the idea of “car sharing”.If we share a car, we’ll only        when we use it.

Now many people are starting to do car sharing.In Switzerland,almost 40,000 people have          it.Japan is also trying to make       popular around the country.

Car sharing is the beginning of a new idea in      .It is also very nice for us to travel everywhere    buying a car.Do you love to share a car with others?                                                                         

小题1:A.popular            B.interesting         C.funny          

小题2:A.are washed         B.are driven         C.are parked      

小题3:A.as far as            B.as long as          C.as much as      

小题4:A.the other           B.others             C.other        

小题5:A.make              B.save              C.find            

小题6:A.spend              B.cost              C.pay

小题7:A.joined             B.covered            C.take part

小题8:A.time saving         B.money saving       C.car sharing   

小题9:A.fashion           B.transportation       C. the world

小题10:A.without          B.with              C.by