转基因动物时，整合到动物细胞基因组内的是（）
A.病毒DNA
B.细菌DNA
C.mRNA
D.目的基因
E.rRNA
参考答案：D
下列实验操作达不到实验目的的是
根据句意及首字母（汉语）提示，补全单词。
1. Why is your finger b_____ ?
2. My hand was b_____ by a dog.
3. Do you have a h_____ problems?
4. L_____, he wasn't hurt badly.
5. You should take your t_____ before you go to see the doctor.
