与现代生物进化理论不相符的表述是[ ] A.基因突变、染色体变异和基因重组都是不

题型:选择题

问题:

与现代生物进化理论不相符的表述是[ ]

A.基因突变、染色体变异和基因重组都是不定向的

B.种群间由于地理障碍不能发生基因交流的现象叫生殖隔离

C.新物种的形成意味着生物能够以新的方式适应环境

D.表现型与环境相适应的个体有更多的机会产生后代而改变种群的基因频率

考点:现代生物进化理论的主要内容
题型:选择题

根据材料内容选择最佳答案,并将其标号填入题前括号内。

    Farmer John and Farmer Bob were neighbours. For more than 30 years, they had been getting along very

well.

    Then their good relationship broke. It began with a small thing, then bitter words, and then weeks of silence.

One morning Farmer John woke up to find a stream between the two farms."It must be Bob," John thought.

    Then one day there was a knock on John's door. He opened it to find a carpenter (木匠) standing at the door

way.

    "I'm looking for a few days' work," the carpenter said.

    "I do have a job for you," John said."Look across the stream at that farm. That's my neighbour Bob. He dug

a stream between the two farms. I want you to build a fence-an 8-foot fence. I don't want to see his place or his

face any more. I don't have such a neighbour!"

    The carpenter said,"I think I know what to do, sir, and I'll be able to do a job that pleases you."

    Farmer John helped the carpenter get the materials(材料) ready and then he was off for the day.

    About sunset when the farmer returned, the carpenter had just finished his job. The farmer's eyes opened

wide. There was no fence there at all!

    It was a bridge! And the neighbour, Bob, was coming across, with his hand outstretched (伸出). "Hi, John!

You're quite a fellow to build this bridge!"

    Then they met in the middle, taking each other's hands."I'm terribly sorry for what I have said and done. We

should be good to each other." said Farmer Bob.

    Then they turned to see the carpenter, who was ready to go."No, wait! Stay a few days. I have a lot of other

jobs for you," said Farmer John."I'd love to stay," the carpenter said,"but I have more bridges to build."

1. Just before the carpenter came, John and Bob              each other. [ ]

A. didn't speak to

B. were friendly to

C. often fought with

D. never had bitter words with

2. Farmer John asked the carpenter to build a fence because              . [ ]

A. he wanted to protect his farm

B. he didn't want to do it himself

C. he wouldn't like to see Bob

D. he wanted to find him something to do

3. What does the sentence "You're quite a fellow to build this bridge!" mean? [ ]

A. John was great to build this bridge.

B. John was not good at building bridges.

C. John was foolish to build such a bridge.

D. John should build the bridge earlier.

4. What do you think of the carpenter? [ ]

A. Shy.

B. Wise.

C. Proud.

D. Careless.

5. What is the best title for the passage? [ ]

A. What a Big Fence!

B. A Strong Bridge

C. Three Kind Men

D. A Fence or a Bridge?

题型:选择题


Questions 23-26

A.(A) Because they want to feel the thrill and excitement.

B.(B) Because they are tired of modern-day university life.

C.(C) Because they are interested in the scientific experiment.

D.(D) Because they find that it is the best way to reduce weight.

题型:选择题

电Ⅲ仪表信号范围是()。

A.0-10mA

B.1-5V

C.0.02-0.1A/cm

题型:选择题

缺陷产品的生产者应对因该产品造成的他人人身、财产损害承担无过错责任。

题型:选择题

当下列情况出现时,整个系统将不会关停()。

A、压缩机振动高

B、压缩机排出温度高

C、压缩机排出压力高

D、压缩机滑油液位低

更多题库