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问题 填空题

若x=2时，代数式ax3+bx+1的值为6，则当x=-2时，代数式ax3+bx+1的值是______．

答案

∵x=2时，代数式ax3+bx+1的值等于6，

把x=2代入得：8a+2b+1=6，

∴8a+2b=5，

根据题意把x=-2代入ax3+bx+1得：

-8a-2b+1

=-（8a+2b）+1

=-5+1

=-4；

故答案为：-4．

选择题

人民日报拉萨2013年8月12日电　12日晚8时，“雪顿之夜”大型音乐会暨闭幕式在歌舞团剧场上演，“雪顿”汉语意为“酸奶盛宴”，以展佛为序幕，以看戏、群众游园为主要内容，还融入了商品展销、体育赛事等活动。据此回答下列各题。

小题1:雪顿节是哪个民族的传统节日

A．侗族

B．维吾尔族

C．蒙古族

D．藏族小题2:外地人去这里观看雪顿节的表演，能感受到这里此时的气候特征是

A．高温多雨

B．炎热干燥

C．凉爽，日温差大

D．炎热，日温差大
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单项选择题

The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether.

For real numbers a, b, and c, is ab=bc+3 ？（）
(1) ab=3b
(2) b+3=c

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.
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