下列计算正确的是( ) A.x4+x2=x6 B.x3-x2=x C.(x3)2

题型:选择题

问题:

下列计算正确的是(  )

A.x4+x2=x6

B.x3-x2=x

C.(x32=x6

D.x6÷x3=x2

考点:有理数除法有理数的乘方同类项
题型:选择题

下列关于沉淀溶解平衡的说法中不正确的是(  )

A.难溶电解质在溶液中存在沉淀溶解平衡,且是一种动态平衡

B.Ksp只与难溶电解质的性质与温度有关,而与沉淀的量和溶液中离子的浓度无关

C.Ksp反映了物质在水中的溶解能力,可直接根据Ksp的大小比较电解质在水中溶解能力的大小

D.可通过Q和Ksp的相对大小,来判断沉淀溶解平衡的移动方向

题型:选择题

两根足够长的金属导轨竖直放置,间距为L,底端接阻值为R的电阻。将质量为m的金属棒悬挂在一个固定的轻弹簧下端,金属棒和导轨接触良好,导轨所在平面与磁感应强度为B的匀强磁场垂直,如图所示。除电阻R外其余电阻不计。现将金属棒从弹簧原长位置由静止释放,则

A.释放瞬间金属棒的加速度等于重力加速度g

B.金属棒的速度为v时,金属棒两端的电压U=BLv

C.金属棒的速度为v时,所受合外力的大小为F=

D.B球对轻杆做功

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Ⅱ. 语言知识及应用(共两节。满分35分)

第一节 完形填空(共10小题;每小题2分,满分20分)

阅读下面短文,掌握其大意,然后从21~30各题所给的A、B、C和D项中,选出最佳选项,并在答题卡上将该项涂黑。

In 1933 an unknown American called Clarence Nash went to see the film-maker Walter Disney. He had a(n)    21    voice and he wanted to work in Disney’s cartoon film for children. When Walter Disney heard Nash’s voice, he said, “Stop! That’s our    22   .”

Disney declared Nash perfect for the role of a talking duck in their upcoming animated short, The Wise Little Hen. The duck, of course, was Donald Duck, which    23    his sailor jacket and hat. Later that year he became a    24    after an eight-minute Mickey Mouse film. The cinema    25    liked him because he was lazy and    26   , and because he    27    his temper very easily. And they loved his voice when he became angry with Mickey’s eight nephews. Soon Donald was more popular than Mickey Mouse himself,    28    because he wasn’t a goody-goody (伪善的人), like Mickey.

Donald Duck went on to become one of the most famous cartoon characters in the world, and a great part of this was due to Nash's distinctive voice. The last film to    29   Nash's famous voice was Mickey's Christmas Carol, released in 1983. And then Donald Duck and his voice    30    — there were no more new cartoons.

21. A. sweet                         B. terrible                 C. unusual                    D. familiar

22. A. film-maker             B. dresser                  C. Mickey                 D. duck

23. A. dressed                 B. wore                     C. sold                      D. took

24. A. star                           B. journalist                  C. sailor                    D. cartoon-maker

25. A. audiences                B. performers            C. directors               D. photographers

26. A. nice                              B. greedy                  C. helpful                        D. sincere

27. A. controlled               B. stood                    C. lost                       D. mastered

28. A. formally                 B. merely                  C. probably               D. scarcely

29. A. ignore                    B. feature                  C. imitate                  D. follow

30. A. changed                  B. formed                 C. trembled                D. Disappeared

题型:选择题

区域环境现状调查和评价时,要概述区域环境保护规划和主要环境保护目标和指标,分析区域存在的主要环境问题,并以( )列出可能对区域发展目标、开发区域目标形成制约的关键环境因素或条件。

A.方框图的形式


B.定量形式
C.表格形式



D.数学模式计算后

题型:选择题

议论的要素是()

A、论据、论证、结论

B、论点、论证和驳论

C、立论、论点、论证

D、论点、论据和论证

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