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【单选题】
电路如图 所示, 电压 U 、 电流 I 的方向已标注在图中,且 I= -1A,描述正确的是( ) 。A.
U、 I为关联参考方向，电流I的实际方向是自a流向b。
B.
U、 I为关联参考方向，电流I的实际方向是自b流向a。
C.
U、 I为非关联参考方向，电流I的实际方向是自a流向b。
D.
U、 I为非关联参考方向，电流I的实际方向是自b流向a。
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【单选题】听力原文： Bad as well as good moods spice life and build character. The key is balance. We often have little control over when we are swept by emotion. But we can hove some say in how long that emotion wi...
A.
We can take control when we are swept by emotion.
B.
We can control the length of time emotion lasts.
C.
We can find the cause of emotion.
D.
We can prevent bad emotions from happening.
【单选题】关于氢键，下列说法正确的是 （ ）
A.
分子间形成的氢键使物质的熔点和沸点升高；
B.
冰中存在氢键，水中不存在氢键；
C.
每一个水分子内含有两个氢键；
D.
H 2 O是一种非常稳定的化合物，这是由于氢键所致
【单选题】听力原文： Sex education is a serious scientific subject, which is as important as the other sciences and arts subjects, even if it is not included in the exams, especially the college entrance examination...
A.
Many people will still regard sex education as embarrassing.
B.
Proper sex education is mentally helpful for teenagers' growth.
C.
Teenagers' chances to see psychological doctors have increased.
D.
Without the proper guidance of the teachers, no teenagers will grow healthily.
【单选题】听力原文： Reading to oneself is a modem activity which was almost unknown to the scholars of the classical and medieval worlds, while during the fifteenth century the term 'reading' undoubtedly meant read...
A.
Silent reading had not been discovered.
B.
There were few places available for private reading.
C.
Few people could read for themselves.
D.
People relied on reading for entertainment.
【单选题】关于氢键，下列说法正确的是( )
A.
每一个水分子内含有两个氢键
B.
冰、水和水蒸气中都存在氢键
C.
分子间形成的氢键使物质的熔点和沸点升高
D.
H 2 O是一种非常稳定的化合物，这是由于氢键所致
【单选题】听力原文： Reading to oneself is a modem activity which was almost unknown to the scholars of the classical and mediaeval worlds, while during the fifteenth century the term 'reading' undoubtedly meant rea...
A.
Silent reading had not been discovered.
B.
There were few places available for private reading.
C.
Few people could read for themselves.
D.
People retied on reading for entertainment.
【单选题】According to feminine and masculine talk, " I can top than" is uttered by ____
A.
men
B.
women
C.
teachers
D.
bosses
【简答题】Top 5 masculine countries are _________, _________, _________, _________, _________.
【简答题】听力原文：What is the key point of traveling by plane? What is the key point of traveling by plane? It is to give yourself ______.
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