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【判断题】
CSS3中,:before伪元素选择器必须配合content属性来指定要在被选元素的内容前面插入的具体内容。A.
正确
B.
错误
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皮皮学刷刷变学霸
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【单选题】听力原文：W: Why are you so tired and upset? M: I've been taking the history course this term. But the trouble is that I'll never get through the reading list. Q: Why is the man worried? (19)
A.
He has lost his history book.
B.
He doesn't like the history course.
C.
He has to read a lot of history books.
D.
He finds history difficult to understand.
【单选题】听力原文：W: Why are you SO tired and upset? M: I've been taking a history course this term. But the trouble is that I'll never get through the reading list. I just don't know whether I could survive the f...
A.
He finds history books difficult to understand.
B.
He has to read a lot of history books.
C.
He doesn't like the history course.
D.
He has lost his history book.
【单选题】—Why does he look so tired these days? —Because he is _____too much pressure. [ ]
A.
in
B.
on
C.
under
D.
before
【简答题】某理想气体的 C V, m = 3 R / 2 ,开始处于 0 °C, 100 kPa 和 100 dm 3 。 ( 1 ) 若恒容升温,使其压力变为 200 kPa ; ( 2 ) 若绝热可逆压缩,压力变为 200 kPa 。 分别求出上述两个过程的 Q , W , D U , D H 。
【多选题】初诊Graves病核医学检查的异常表现为（）
A.
T3、T4↑，sTSH↓
B.
甲状腺摄131I率↓
C.
TGAb、TPOAb大多阳性
D.
TRAb、TSI（甲状腺刺激抗体）大多阳性
E.
甲状腺激素抑制试验表现为受抑制
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