皮皮学，免费搜题
登录
搜题
【单选题】
下面为噬菌体侵染细菌示意图。若用 32 P标记噬菌体的DNA，然后使其感染大肠杆菌，一段时间后，在大肠杆菌裂解所释放出的大量新噬菌体中，检测到 32 P。这个实验结果说明（）A.
DNA是主要的遗传物质
B.
DNA能够复制并保持连续性
C.
DNA能够转录RNA
D.
DNA能够指导蛋白质的合成
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】根据句意和汉语提示,补全单词. 1. It is a fact that English is being (接受)as an international language. 2. People travel to meet new friends, to try new food, and to (体验)life in other parts of the world. 3. She found...
【简答题】圆柱的体积是______的圆锥体积的3倍，所以圆锥体积的公式是______．
【单选题】_______ people went to the concert which was held in Gengsu Theatre ________ the night of April 1 st .
A.
Thousands of; in
B.
Thousand of; on
C.
Many thousand; in
D.
Thousands of; on
【简答题】根据句意及汉语提示，写出单词。 1. Di fferent kinds of _________ (税) are paid in the U.S. 2. Stealing things is a _________ (犯罪). 3. He lives in the _________ (郊区) of Beijin g and works in the city. 4. It's not my __...
【简答题】根据汉语提示写单词。 1. This is my __________(直尺)． 2.A _________ (电脑)is useful(有用的)． 3. -What's this _________ (用英语)? -It's a gold ring(金戒指)． 4. -Is ________ (那个)your backpack? -No, it isn't. 5.A set of ...
【单选题】The spaceman returned to Earth and safely landed in that area _____ the night of April 29. [ ]
A.
in
B.
on
C.
at
D.
by
【简答题】学习“圆柱体的体积”时，是把圆柱体转化成学过的______体，并推导出圆柱体体积公式．
【简答题】球的体积公式是：球体体积= 4 3 π r 3 ．请用公式计算直径为2.45米的球的体积（用计算器计算，保留两个有效数字，π取3.14．）
【单选题】_________ people went to the concert that was held in Jinyun Square __________ the night of April 25.
A.
Thousands of; in
B.
Two thousands; on
C.
Thousands of; on
D.
Many thousand; in
相关题目：