【简答题】电路的三种工作状态是通路、开路和(__)。
【单选题】What can you suppose is true of the group's report?
A.
It has three sentences.
B.
It must describe clouds.
C.
It is not due until several days.
D.
It is about the stars and planets.
【单选题】听力原文: More than 40 years ago, John Williams gave away all of his belongings and went off to file mountains to live the way people lived 100 years ago. For food he traps wild animals, fishes in the riv...
【单选题】听力原文: More than 40 years ago, John Williams gave away all of his belongings and went off to the mountains to live the way people lived 100 years ago. For food, be traps wild animals, fishes in the riv...
B.
Nobody, he sleeps outside.
【单选题】听力原文: More than 40 years ago, John Williams gave away all of his belongings and went off to the mountains to live the way people lived 100 years ago. For food he traps wild animals, fishes in the rive...
【单选题】Suppose P(AB) = 0, it is conclused that ( ).
B.
A and B are independent