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【简答题】
（1）设α为第四象限角，其终边上一个点为 (x，- 5 ) ，且 cosα= 2 4 x ，求sinα． （2）已知tanα=3，求 sin 2 α-2sinαcosα- cos 2 α 4 cos 2 α-3 sin 2 α 的值．
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举一反三
【多选题】[WJ-200-100]星型网络拓扑结构的特点是()。
A.
它的局域网系统中存在着中点
B.
每个节点通过点到点的链路与中心节点进行连接
C.
任何两个节点之间的通信都是通过中心节点连接
D.
主要用于以太网
【单选题】The first copyright act that granted both pecuniary and moral rights to authors with minimal formality was passed into law by:
A.
Belgium.
B.
England.
C.
France.
D.
Italy.
E.
The United States.
【单选题】The authors of both passages describe _______________________.
A.
a young person’s sense of wonder at first seeing a play
B.
a young person’s desire to become a playwright
C.
the similarities between plays and other art forms
D.
how one’s perception of the theater may develop over time
E.
the experience of reading a play and then seeing it performed
【判断题】Both Dubliners and Billy Budd were badly received during the lifetime of the authors.
A.
正确
B.
错误
【判断题】If you are citing a work with two authors, you are supposed to name both authors in a signal phrase or in parentheses no matter in APA or MLA format.
A.
正确
B.
错误
【单选题】If there are more than 7 authors for one work, which of the following is right in listing the authors?
A.
List the first six authors.
B.
Put the middle authors in parentheses.
C.
Put an ampersand before the last author.
D.
None of the above.
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