真核细胞中()不可能有多核糖体存在。
A、内质网
B、细胞质基质
C、细胞核膜
D、细胞质膜
参考答案:D
用括号内所给单词的适当形式填空。
1. There is lots of ________(money) in the bank.
2. Jenny's mother is a ________ (report).
3. They have two ________ (child), one is a daughter the other is a son.
4. This is the ________ (begin) of the garden.
5. He is very ________ (friend) to us.
6. Koalas usually get up and eat ________ (leaf) at night.
城邦是自然进化的产物,是人类社会组织由低级向高级演进的结果