顺序练习
话题练习
题型练习
口语评分
写作评分
阅读机考
听力机考
口语机考
A.
They live in harsh environments
B.
They are much larger than most other types of bacteria
C.
In their structure, they may resemble viruses
D.
In their biochemistry, they may be similar to plants and animals
正确答案:AD
译文