搜题请搜索小程序“爱下问搜题”
问题 选择题
在△ABC中，a=4，A=45°，B=60°，则b等于（　　）
A．2
6
B．2+2
3
C．
3
+1		D．2
3
+1
答案

由正弦定理可得，在△ABC中，

∵a=4，A=45°，B=60°，

∴b=

a•sinB
sinA
=
4•sin60°
sin45°
=2
6

故选A

材料题

阅读下列材料

材料一：法国收回阿尔萨斯和洛林，萨尔矿区交给法国开采，萨尔区由国际联盟代管15 年；确定德波边界，把原来属于波兰的一些地区仍留给德国。总的来说，德国失去了原来领土的1/8 ，同时却保留下了10万平方千米历来属于波兰的领土。德国的领土缩小了很多，但却成功地避免了肢解，完整地保留了下来。

材料二：除中国外，缔约各国协定：一、新生中国主权的独立，及领土与行政之完整；二、给予中国完全无碍之机会，以发展并维持一有力巩固之政府；三、施用各种之权势，以期切实设立维持各国在中国全境之商务实业机会均等之原则；四、不得因中国状况，乘机营谋特别权利，而减少友邦人民之权利，并不得奖许有害友邦安全之举动。

请回答下列下列问题：

（1）材料一指的是什么条约哪方面的内容？是什么会议通过的？主要确立了哪些地方的统治秩序？

________________________________________________________________________________

（2）材料二指的是什么条约？它是在哪一次会议上通过的？主要确立了什么地方的统治秩序？

________________________________________________________________________________

（3）思考这两次会议之间有什么联系？这两次会议的实质是什么？它对世界历史有何重要影响？

________________________________________________________________________________
查看答案
填空题



Every human being is fallible; we make mistakes. In America when a mistake has been made, it is considered fitting for the person (1) to acknowledge his or her error and to apologize to anyone who has been inconvenienced. Even (2) are expected to admit their mistakes and apologize for them. Trying to (3) a mistake and denying your guilt are considered to be indicative of serious (4) .
If you make a mistake that (5) a group of people, a public apology is considered the best method for (6) . If the mistake was a serious one, or if some people were inconvenienced more than others, then the (7) should follow the public apology with private ones to (8) .
It is especially important for executives and company heads to be able to admit their mistakes. Sometimes leaders are afraid that if they (9) , they will lose the respect of their employees. Actually (10) — if you are honest with your employees and yourself, (11) , and show that you are willing to accept blame when you make a mistake, then your employees will be (12) you. They will also be more likely to admit their own mistakes.
If you (13) one person, it is usually best to apologize to that person alone, unless your mistake (14) by a large group of people. For example, if Leonard (15) to Mr. Todd during a committee meeting, it would be (16) for Leonard to apologize to Mr. Todd at the next committee meeting. If the (17) created by the initial mistake is public, then the apology should be public. However, if Leonard raised his voice to Mr. Todd when only the two of them (18) , he may apologize privately. Notice as well (19) the apologies are. As soon as you realize you have made a mistake, you should (20) .
查看答案