问题 填空题

如图是2010年冰岛火山喷发照片.喷发出的岩浆是多种物质成分组成的液体,在流淌过程中不断降温,就会按下列顺序先后在火山口形成一系列的矿物:橄榄石——辉石——角闪石——黑云母——正长石——白云母——石英,由此可以判断出这些矿物的熔点依次     (填“升高”或“降低”).火山喷发时,高温的岩浆会使河面上的冰层      (选填“熔化”或“凝固”),导致河流水位暴涨;大量的火山灰尘上升后遮挡在地球上空,就像撑起了一把伞,使射向地面的阳光在火山灰尘上发生       (选填“反射”、“折射”或“色散”),可能会对区域性气候产生轻微降温影响.

答案

降低、熔化、反射

题目分析:火山喷发出的岩浆温度比较高,高于岩浆所有矿物质的熔点.所以矿物质呈液态,由于温度降低,达到了矿物质的凝固点,所以发生凝固.哪种矿物质的凝固点高哪种先凝固;温度继续下降,才能凝固的矿物质凝固点就是低的.所以第一个空是“降低”.冰是固态,由于遇到高温的岩浆,冰从中吸热熔化成水.故第二个空是“熔化”.由于光在传播过程中遇到物质的界面要发生反射.所以遇到灰尘会反射.太阳光被挡住,所以可能会对区域性气候产生轻微降温影响。解决此问要注意题中“像撑起一把伞”说明光发生了反射。

阅读理解

When you are feeling unhappy or forget how great you are, these are six ways to make you feel good about yourself.

Look in the mirror and say to yourself, ‘ I am a special person and there’s no one in the world like me. I can do anything!’ It may not sound so good, but it really works!

Do something nice for someone. Helping others always makes you feel good.

Smile! Be friendly to the people you meet. Look for the good things in your friends and family.

Learn something new! Do you want to decorate(装饰) your own room or learn how to swim? Go for it! New challenges(挑战) are fun and give you a sense of accomplishment(成就感) when you finish them.

Keep a diary. Turn off the TV and let your imagination fly! Write down your thoughts(思想), dreams or anything you want!Writing always helps to express(表现) your feelings.

Stay with your family. We all need our family time. Talk with your mum or dad or maybe even your cousin.

小题1:You may see this passage in __________.

A.a science book

B.a storybook

C.a magazine

D.the school gate小题2:According to the passage, when you are helping others, you will_________.

A.be special

B.be sure

C.feel nice

D.feel terrible小题3:In the passage, new challenges ______ when you finished them.

A.are fun

B.make you feel confident

C.are dreams

D.both A and B小题4:The best title for the passage is ‘________’.

A.Do you best

B.Six ways to feel good about yourself

C.It’s never too late to learn

D.Always smile at your life

问答题 简答题