皮皮学，免费搜题
登录
搜题
【单选题】
水中加入表面活性剂后,将会发生( )。A.
正吸附
B.
负吸附
C.
正吸附
D.
负吸附
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
【单选题】Georges Valensi's patent lasted until 1971 because ______.
A.
nobody would offer any reward for his, patent prior to that time
B.
his patent could not be put to use for an unusually long time
C.
there were not enough TV stations to provide color programmes
D.
The color TV receiver was not available until that time
【单选题】听力原文：Michael would have been second to nobody in his class if he had not made any mistakes in the grammar section of the final exam. (26)
A.
Michael had not made any mistakes in the grammar section.
B.
Michael is the second to have had made grammatical mistakes.
C.
Michael didn't rank the first in the final exam.
D.
Michael failed in the final exam.
【简答题】地中海风格软装实战演练
【单选题】George Valensis patent lasted until 1971 because______.
A.
nobody would offer any reward for his patent prior to that time
B.
his patent could not be put to use for an unusually long time
C.
there were not enough TV stations to provide colour programmes
D.
the colour TV receiver was not available until that time
【单选题】Georges Valensi's patent lasted until 1971 because ______ .
A.
nobody would offer any reward for his patent prior to that time
B.
his patent could not be put to use for an unusually long time
C.
there were not enough TV stations to provide color programs
D.
the color TV receiver was not available until that time.
相关题目：