Ta老师题库

According to the passage,a great variety of influenza strains can appear when______.

10 查阅

According to the passage，a great variety of influenza strains can appear when______.

A. H and N spikes are produced

B. animal and bird viruses are combined

C. dissimilar types virus recombine

D. two viruses of the same type are contracted

参考答案:

C[解析] 见第二段第二句话“The result of such recombinations is a great variety of strains constraining different H and N spikes. ”。

相关问题:

Passage Two Only one animal can walk 200 miles without stopping on

A good way to train an animal to do something quickly is to_____.A

Some warm－blooded animals ______ hibernate.

Agood_______ofanimalshibernateandduringtheirhibernationtheyeat

Peppeberg’s work with Alex was intended to prove that animals.

Passage One Animals have different ways of protecting themselves a

According to those against killing wolves,when wolves eat other an

CPlants can’t communicate by moving or making sounds, as most ani

随便看看:

版权所有,保留一切权利！© 2018-2023 Ta老师 Talaoshi.com 湘ICP备18019507号-1 联系QQ:469958。