皮皮学，免费搜题
登录
搜题
【判断题】
电压源和电流源等效变换前后电源外部是不等效的。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
【单选题】After several sleepless nights, Mr Johnson ________ a perfect solution to the financial problems of his company. [ ]
A.
came up with
B.
put up with
C.
kept up with
D.
ended up with
【单选题】Many summer insomniacs ______.
A.
can't make up for the sleepless nights
B.
sleep in the afternoons
C.
can get extra sleep at night
D.
can never sleep well
【单选题】After a sleepless night, she looked very __________.
A.
ghastly
B.
horrible
C.
afraid
D.
scared
【单选题】听力原文：M: How are you doing with your essay, Mary? W: After two sleepless nights, I'm finally through with it. What do we learn from this conversation?
A.
The man thought the essay was easy.
B.
The woman had a hard time writing the essay.
C.
The woman thought the essay was easy.
D.
Neither of them has finished the essay yet.
【简答题】After a sleepless night，during which Joe smoked a whole pack of cigarettes，his eyes were blooded and his breath smelled of tobacco．
【单选题】After several sleepless nights, Mr. Smith ______ a perfect solution to the problems.
A.
kept up with
B.
put up with
C.
came up with
D.
ended up with
相关题目：
【单选题】After a sleepless night, she looked very __________.
A.
ghastly
B.
horrible
C.
afraid
D.
scared