问题 问答题 简答题

简述大气圈对岩石圈的作用。

答案

参考答案:

大气圈对岩石圈的作用表现为岩石圈表层的风化作用以及风的剥蚀作用、搬运作用和沉积作用。风化作用指在地表或近地表条件下,在大气、温度、水、生物等因素的影响下,岩石或矿物在原地遭受分解和破坏的过程。风化作用可分为物理风化、化学风化两种类型。风化作用的产物主要有岩石和矿物碎屑、细小的粘土、土壤和风化壳。

风的剥蚀作用是指风对地表的破坏作用,形成各种风蚀地形,如风蚀蘑菇石、风蚀谷、风蚀城、风蚀穴、风蚀柱等。

风的搬运作用是指风将碎屑物质从一个地点搬运到另一个地点的过程。

一旦风力减小,风所携带的碎屑物质会逐渐沉积下来,即发生风的沉积作用。风的搬运作用和沉积作用往往在原地和异地分别形成岩漠、戈壁和沙漠、黄土等。

完形填空

II 语言知识及应用(共两节,满分35分)

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选项中,选出最佳选项,并在答题卡上将该项涂黑。

I take the firm position that parents do not owe their children college education.If they can __21__ it, they can certainly send them to the best universities.But they must not feel guilty if they can’t.If the children really want to go, they’ll find a __22__.There are plenty of loans and scholarships for the bright and eager ones who can’t afford to pay.

When children grow up and want to __23__, their parents do not owe them a down payment on a house.They do not have the duty to baby-sit their grandchildren.If they want to do it, it must be considered a __24__ not an obligation.

Do parents owe their children anything? Yes, they owe them a great deal.

One of their obligations is to give their children a personal __25__.A child who is constantly made to feel stupid and unworthy, constantly compared to brighter brothers, sisters, or cousins will become so __26__, so afraid of failing that he (or she) won’t try at all.Of course they should be __27__ corrected when they do wrong, but it’s often better to let children learn their mistakes by themselves __28__.All our parents should do is to trust them, respect them, tolerate them and give them chances to try and fail.They must learn to stand __29__.When criticisms are really needed, they should be __30__ with praises, with a smile and a kiss.That is the way children learn.

21.A.find                      B.get                         C.afford                     D.receive

22.A.supply                    B.help                       C.hand                       D.way

23.A.get married             B.get a job                 C.go abroad               D.live alone

24.A.pleasure                  B.favor                      C.habit                      D.service

25.A.worth                     B.affair                      C.belief                            D.respect

26.A.unknown                B.unusual                   C.unsure                    D.unfair

27.A.properly                 B.gently                     C.nearly                    D.possibly

28.A.now and then          B.in time                   C.at once                   D.right now

29.A.failure                    B.honor                     C.progress                  D.test

30.A.mixed                    B.satisfied                  C.shared                    D.balanced

单项选择题