【单选题】As a saying goes, the wise man knows he knows nothing, _________ the fool thinks he knows all.
【简答题】图示正弦交流电路中,已知【图片】V,【图片】W,则其有功功率等于( )W。【图片】
【简答题】图示正弦交流电路中,已知【图片】,则其有功功率等于()W。【图片】
【简答题】A.Moving to New York for her university. B.Going to Europe and have fun. C.Having a summer job at a coffee shop. D.Helping her mother with the housework.
【单选题】Which of the following is the topic sentence of the second paragraph?
A.
For many of us summer is a special time for forming new friendships.
B.
Today millions of Americans vacation abroad.
C.
No one really expects a vacation trip to produce a close friend.
D.
But surely the beginning of friendship is possible.
【单选题】The speculation,______ by some suggestive evidence, came from an American scientist.
【单选题】What is the function of the last paragraph in relation to the passage as a whole?
A.
It summarizes the benefits students can derive from the experimental scholarly methods course.
B.
It provides additional reasons why Griffith's works raises issues having to do with the canon of authors.
C.
It provides an illustration of the immediate nature of the experiences students can derive from the experimental scholarly methods course.
D.
It contrasts the experience of a student in the experimental scholarly methods course with the experience of a student in the traditional course.
【单选题】下列哪一项最能说明负强化的概念?
C.
一只大鼠按下杠杆导致遭遇通过房间地板的电击。