皮皮学，免费搜题
登录
搜题
【判断题】
振荡器(即摇床)是组培培养室必备的设备。A.
正确
B.
错误
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】The clever boy took the clock apart and then ______ it in a short time． 这个聪明的小男孩把闹钟拆了，一会儿就又装好了。
【简答题】你在做 Southern 印迹分析,并且刚完成了凝胶电泳这一步。根据方案,下面一步骤是用 NaOH 溶液浸泡凝胶,使 DNA 变性为单链。为了节省时间,你略过了这一步,直接将 DNA 从凝胶转至硝酸纤维素膜上。然后用标记探针杂交,最后发现放射自显影片是空白。错在哪里 ?
【简答题】你在做Southern印迹分析，并且刚完成了凝胶电泳这一步。根据方案，下面一步骤是用NaOH溶液浸泡凝胶，使DNA变性为单链。为了节省时间，你略过了这一步，直接将DNA从凝胶转至硝酸纤维素膜上。然后用标记探针杂交，最后发现放射自影片是空白。错在哪里？试分析其原因。
【单选题】The clever boy made a hole in the wall, ______he could see______was going on inside house.
A.
which; what
B.
through which; what
C.
through that; what
D.
what; that
【单选题】三相变压器的联接组别为D,yn表示,下列说法正确的是()。
A.
一次绕组为Y形联接，二次绕组为有中性线的Y形联接。
B.
一次绕组为三角形联接，二次绕组为有中性线的Y形联接。
C.
一次绕组为有中性线的Y形联接，二次绕组为三角形联接。
D.
一次绕组为三角形联接，二次绕组为三角形联接。
【单选题】The clever boy made a hole in the wall, _____ he could see _____ was going on inside the house. [ ]
A.
which; what
B.
through which; what
C.
through that; what
D.
what; that
【单选题】_______ seems strange to us is ________ the clever boy failed in the exam.
A.
It; that
B.
What; what
C.
It; how
D.
What; that
【单选题】The clever boy made a hole in the wall, _______ he could see _____ was going on inside house. The clever boy made a hole in the wall, _______ he could see _____ was going on inside house. A. which; wh...
A.
which; what
B.
through which; what
C.
through that; what
D.
what; that
相关题目：
【简答题】The clever boy took the clock apart and then ______ it in a short time． 这个聪明的小男孩把闹钟拆了，一会儿就又装好了。