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【多选题】
关于洛伦兹力说法正确的是A.
洛伦兹力为电荷所受的磁场力
B.
C.
带正电粒子的速度、磁场与受右手螺旋关系
D.
右手螺旋关系为
E.
大小为 ； 为 与 的夹角
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【单选题】Where does the man keep most of his collection? A.In his workroom. B.In his basement. C.In his garage.
A.
B.
C.
C
【简答题】20世纪60年代后,人体工程学进入一个新的发展阶段, 协调发展是这一 阶段的研究中心。
【简答题】A．The decline in his health. B．His desire to start his own business. C．The cr in his family life. D．His dream of living in the countryside.
【单选题】Which of the following is not true?
A.
John Harold Drake criticize problem children in his book.
B.
Two 10-year-old boys are his central characters in his book.
C.
The message conveyed by the characterization is important.
D.
The author of the text prefers to regard the book as a drama than novel.
【简答题】Two men, both seriously ill, were in the same hospital room. One man was allowed to _ 16 _ up in his bed for an hour each afternoon. His bed was _ 17 _ the room’s only window. The other man on the oth...
【简答题】He began to work in a factory when he was still ______. A) in his B) in his s C) in D) in s
【单选题】20世纪60年代后，人体工程学进入一个新的发展阶段，（）成为这个阶段主要的研究内容。
A.
人适应机器
B.
人―机―环境互相协调
C.
机器适应人
D.
人与环境互相适应
【单选题】He became a famous writer when he was ______. [ ]
A.
in his fifty
B.
in his fifties
C.
in fifty years old
D.
in fifties
【简答题】听对话，回答问题。 1. Where does the man live now? A. In his house. B. In his office. C. In his friend's home. 2. What kind of color TV does the man want to buy first? A. A small one. B. A big one. C. A cheap ...
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