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【单选题】
下列哪些实验在证明核酸是遗传物质中起了决定性作用?( )A.
Chargaff(1958)DNA碱基组成的研究
B.
Waston和Crick于1953年提出的DNA双螺旋模型
C.
Avery O.等1944年的肺炎双球菌转化实验
D.
Wilkins和Franklin(1953年)DNA的X射线晶体衍射研究
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反馈参考答案：
举一反三
【简答题】A．She is neater than the woman's previous roommate. B．She doesn't like the woman's last roommate. C．She doesn't like to clean. D．She'll probably move soon.
【简答题】A．Please sit down. B．She doesn't want him to sit down. C．She doesn't like the man. D．She wants the man to go away.
【简答题】A．She doesn't need his help. B．She doesn't like the man. C．She wants to work for the. man. D．She wants to ask for help.
【简答题】滴虫、细菌、真菌引起的混合感染阴道炎宜选用 查看材料
【单选题】What does the woman complain about?
A.
She doesn't like the furniture in the apartment.
B.
She can't bear the noise from one of his neighbors.
C.
She doesn't like the managing way of this apartment.
【简答题】A．She is neater than the woman's previous roommate. B．She doesn't like the woman's last roommate. C．She doesn't like to clean. D．She'll probably move soon.
【简答题】真菌性阴道炎多由哪种真菌引起？
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