某个DNA分子中有腺嘌呤22%,在此DNA分子中胞嘧啶占()
A.22%
B.44%
C.28%
D.78%
参考答案:C
根据括号里所给的汉语写出英语单词。
1. Are you_____(有空)tonight?
2. Which are your favorite _____(动物).
3. I have two _____ (家兔) , and they are very cute.
4. —What time is it?
—It’s a _____ (一刻钟) past eight.
5. There are a _____(一百) chickens in this area.
急性心肌梗死时发生室颤尽快应用
A.同步直流电复律B.非同步直流电复律C.体外反搏术D.起搏器临时起搏E.用奎尼丁、胺碘酮