问题 问答题

阅读下列材料,按要求回答问题.

        小轮车今年5月28日至6月2日,省城太原成功举办了“2008国际自行车联盟BMX(小轮车)世界锦标赛”.小轮车是指车轮半径为20英寸的自行车.车身一般采用合金材料制成,可以承受从几米高的地方快速落下的冲力.车把可以转动360度,前后轮都 装有供脚踩的“火箭筒”等.BMX(小轮车)运动是近年来兴起的一项极富挑战性的新型体育运动.本次比赛属于平地花式赛,它最基本的动作有后轮点地跳、前轮点地跳、擦轮、定车、飘、过桥等.赛场上,运动员首先用力蹬车加速上升,越过最高坡道,而后又疾驰而下,跨过不同坡道,不断上升、下降,最终冲向终点.比赛过程中,优秀运动员一次可跨越几个坡道.车手们的精彩表现给太原市民带来了速度、力量与美的享受.

(1)小轮车的车身一般采用韧性好、硬度大的合金材料制成,这样做的目的是:                                              

(2)运动员用力蹬车可加速上升,表明力可以改变物体的              ,到达坡道最高点时自行车仍要继续向前运动,这是因为自行车具有              

(3)运动员骑车离地飞跃到最高空时,受力              (选填“平衡”或“不平衡”).下落过程中,重力势能逐渐变             

答案

(1)可以承受从几米高的地方快速落下的冲力;

(2)运动状态;惯性;

(3)不平衡;小.

完形填空

What is your favourite colour? Do you like yellow, orange, red?   小题1:  Do you prefer greys and blues? Then you are probably quiet, shy, and you would rather follow than lead. You tend to be pessimist. At least, this is what psychologists tell us, and they should know, because they have been seriously studying the meaning of colour preference, as well as the effect that colours have on human beings.   小题2:  If you happen to love brown, you did so, as soon as you opened your eyes, or at least as soon as you could see clearly.

  小题3:  A yellow room makes most people feel more cheerful and more relaxed than a dark green one; and a red dress brings warmth and cheer to the saddest winter day.   小题4:  A black bridge over the Thames River, near London, used to be the scene of more suicides than any other bridge in the area ------ until it was repainted green. The number of suicide attempts immediately fell sharply. Perhaps it would have fallen even more if the bridge had been done in pink or baby blue.

  小题5:  It is an established fact that factory workers work better, harder, and have fewer accidents when their machines are painted orange rather than black or grey.

A.They tell us, among other facts, that we do not choose our favourite colour as we grow up ----- we are born with our preference.

B.On the other hand, black is depressing.

C.If you do, you must be an optimist, a leader, an active person who enjoys life, people and excitement.

D.Light and bright colours make people not only happier but more active.E. Life is like a picture or a poem, full of different colours.

F. Colours do influence our moods---there is no doubt about it.

G. The rooms are painted in different colours as you like.

单项选择题