问题
单项选择题 A1型题
下列有关病毒的叙述中，错误的是（）
A.都不能独立生活
B.有的有益有的有害
C.都对人类有害
D.都是由蛋白质外壳和遗传物质内核组成糖
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
下列有关病毒的叙述中，错误的是（）
A.都不能独立生活
B.有的有益有的有害
C.都对人类有害
D.都是由蛋白质外壳和遗传物质内核组成糖
参考答案：C
| 阅读理解，选词填空。 | |
but they work very hard. ___________ are the biggest animals. They live in the sea. They can get very old, too. Sharks also live in the sea. They can swim very ___________ and can be very dangerous. ___________ can fly. They have great eyes and can see very well. Parrots can also fly. They're very clever and can ___________ very well. Cheetahs are the ___________ runners. They're exciting. ___________ can't run. They can only ___________ so they're very slow. The book has lots of great ___________ too. I can give it to you tomorrow. |