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【单选题】
()是人们在认识和改造客观世界的实践中所获得的认识和经验的总和A.
信息
B.
知识
C.
消息
D.
情报
E.
文献
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反馈参考答案：
举一反三
【多选题】What are the main steps in bargaining?
A.
Ask for after-sales services
B.
Ask for the price
C.
Ask for a lower price
D.
Accept or give up
【简答题】阅读理解。 Have you ever shopped in Beijing? Do you know bargaining (A) is the rule there? At least, it is so in most markets and back-street clothes shops. Bargaining is an art and if you are unfamiliar (...
【单选题】Which of the following statements describes a scenario in which the bargaining power of a supplier is strong?
A.
Competitors have decreased demand for raw materials.
B.
The availability of raw materials is limited.
C.
The supplier has excess inventory.
D.
There are many suppliers providing the same raw materials for comparable prices.
【简答题】（-x-y）（x-y）=______（x+y）（y-x）．
【单选题】下列变形正确的是（ ）
A.
-x+y x-y = -x-y x+y
B.
-x+y -x-y =- x-y x+y
C.
-x+y -x-y = x+y x-y
D.
-x+y -x-y = x-y x+y
【单选题】What is the best title for this passage?
A.
Bargaining and Compromise
B.
Wise Compromise in Britain
C.
Britain and Europe
D.
Setbacks of Compromise
【单选题】若x+y＜0，xy＜0，x＞y，则有（ ）
A.
x＞0，y＜0，|x|＞|y|
B.
x＞0，y＜0，|y|＞|x|
C.
x＜0，y＞0，|x|＞|y|
D.
x＜0，y＞0，|y|＞|x|
【单选题】下列等式成立的是（ ）
A.
x 2 +y 2 =（x+y）（x+y）
B.
x 2 -y 2 =（x+y）（x-y）
C.
-x 2 +y 2 =（-x+y）（-x-y）
D.
-x 2 -y 2 =-（x+y）（x-y）
【简答题】对任意两个集合X、Y，定义X-Y={x|x∈X且x?Y}、X△Y=（X-Y）∪（Y-X）．设A={y|y=x 2 ，x∈R}，B={y|y=3sinx，x∈R}，则A△B=______．
【简答题】根据x+x+x+y+y=54，x+x+y+y+y=46，可求x等于______，y等于______．
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