[单选题] 提问人:匿名网友 提问时间:2021-08-24

David Lack’s research contributed to biological science specifically in the area of _______.


A .Evolution
B .mating behavior
C .animal demography
D .immunology

提问人:匿名网友 提问时间:2021-08-24

参考答案(由小熊题库网聘请的专业题库老师提供的解答)

请点击↑↑↑ 查看官方参考答案 按钮

习题解析

请点击 查看官方参考答案 按钮

您可能感兴趣的题目


1 .You can connect a wire to the positive and negative ends of a battery __________.

A to develop a maglev train rail system. B to explain why maglev trains are faster. C to pull and push the train forward. D to create a magnetic field. E to experiment with the maglev train. F to travel from Paris to Rome in about two hours.

题型: 单选题 提问时间: 2021-08-24

2 .A unique system of magnetic fields is created by the coils _______.

A to develop a maglev train rail system. B to explain why maglev trains are faster. C to pull and push the train forward. D to create a magnetic field. E to experiment with the maglev train. F to travel from Paris to Rome in about two hours.

题型: 单选题 提问时间: 2021-08-24

3 .The frictionless maglev train enables you ___________.

A to develop a maglev train rail system. B to explain why maglev trains are faster. C to pull and push the train forward. D to create a magnetic field. E to experiment with the maglev train. F to travel from Paris to Rome in about two hours.

题型: 单选题 提问时间: 2021-08-24

4 .Why mice are described in the passage as “creatures of the night“ because they are

A frightening to many people B hunted by birds C studied while in hibernation D active after dark

题型: 单选题 提问时间: 2021-08-24

5 .“They” in the second paragraph refers to _______.

A ornithology and general biological science B contributions C professional biologists D birds

题型: 单选题 提问时间: 2021-08-24

7 .According to the passage, the ocean generally has more salt in _______.

A coastal areas B tropical areas C rainy areas D turbulent areas

题型: 单选题 提问时间: 2021-08-24

8 .All of the followings are processes that decrease salinity EXCEPT _______.

A evaporation B precipitation C run off D melting

题型: 单选题 提问时间: 2021-08-24

9 .Why does the author mention the Weddell Sea?

A to show that this body of water has salinity variations. B to compare Antarctic waters with Arctic waters. C to give an example of cold-water salinity. D to point out the location of deep waters.

题型: 单选题 提问时间: 2021-08-24

10 .As predators, ants

A prey on small as well as large animals. B collect nutritious food from the soil C collect food as decomposers. D prey on species much higher up the food chain.

题型: 单选题 提问时间: 2021-08-24

 
如有问题 请联系客服
  • 客服微信