land of snow and ice near the South Pole (南极). Most people do not think there is much life in the icy (结冰的) waters around it. They are wrong.
Antarctica"s seas are full of life. There are many kinds of fishes, water birds, seals, and whales (鲸). They
eat the thick plant life in the sea and the smaller water animals. Some whales, for examples, eat more than a ton
of food every day.
The most famous animal of Antarctica is the penguin (企鹅). It struts (昂首阔步而行) around the icy
beaches as if it were a movie star walking down the street.
B. seal
C. penguin
D. fox
B. warm weather
C. flocks of geese
D. warm water
B. is little plant life
C. are many animals
D. is little snow
B. isn"t
C. is no
D. isn"t any
B. South
C. North Pole
D. South Pole
Each year, from top to bottom, a tree grows a new layer (层) of wood around itself. If you cut across a
tree trunk or branches, you would see that these layers of wood look like rings. By counting tree rings, you
can tell how old the tree is. If you count ten rings, for example, the tree is ten years old.
Looking at the picture shown above, you can see that each tree ring has a dark part and a light part. The
light part wood grows in the spring, the dark part wood in winter. Look also, that some rings in the picture
are wide and others are narrow (窄). Trees grow aide rings during the years when they get a lot of water and
sun-light. By examining tree rings, you can tell what the weather may was like many years ago.
Giant sequoia (红杉) trees, such as the one in the photo above, grow in north-western California. Some of
these sequoias have more than 3000 tree rings. Can you guess how old such a tree would be?
B: layer of wood
C: giant sequoia
D: ten years old
B: every year
C: every 3000 years
D: every two years
B: tells the tree"s age
C: grows in the spring
D: gets light every year
B: most trees do not grow tree rings
C: tree rings add to the tree"s width
D: most of the trees grow rings
B: five months old.
C: Six years old.
D: Ten years old.
During the day we work and play; at night we sleep. Our bodies rest while we sleep. In the morning we
are ready to work and play again. While we are asleep our bodies grow most. Children who are tired usually
need more sleep. We can get our lessons better and we feel better too, when we have had plenty of rest.
Boys and girls who are eight or nine years old need ten hours of sleep every night. Our bodies need plenty
of air when we sleep. If we do not get enough fresh (新鲜的) air we"ll feel tired when we wake up. While
in bed we must not cover our heads. If we do, our lungs (肺) will not get enough fresh air. If we open our
windows at night we can have plenty of fresh air. Cool air is better than warm air. Boys and girls who want
to grow and be strong must get plenty of sleep.
B. playing
C. sleeping
D. waking
B. Cool air
C. Warm air
D. Dry air
B. hungry
C. tired
D. grow
B. Nine hours
C. Ten hours
D. Eeven hours
B. Food
C. Rest
D. Exercise
always prepare before every trip. But what"s the best navigation tool, a Global Positioning System (GPS) or
a good old map and compass? Five of my friends and I hiked through the mountains on a trail I marked. One
team of three carried a GPS, and the other team used a map and compass.
It took the GPS team 3 hours and 11 minutes to get through the whole hike, however, it took the map and
compass team only 2 hours and 49 minutes. The biggest problem the GPS team met was that they lost the
satellite signal (卫星信号) in some places. With no map or compass, they had to walk around until they were
in a place where the signal was good. The map and compass team was able to spot (认出) different landmarks,
compare them to their maps and then use the compass to point them in the right direction.
When I head out on my future hikes, I"m bringing a map, a compass and a GPS to show me the way.
B. know how to use the GPS
C. want to get lost in mountains
D. want to get into the mountains alone
B. went along the same trail
C. had the same problem
D. finished the whole hike at the same time
B. it wasn"t necessary to bring a map and a compass together with a GPS
C. the GPS had some disadvantages in hiking in mountains
Dreams take up about one quarter of our sleeping time. People have several dreams each night. Dreams
are like short films.They are usually in colour. Some dreams are like old films.They come to us over and over
again. That may be because the dreamer is worrying about something. Dreaming may be a way of trying to find
an answer.
Some people get new ideas about their work from dreams. They may have been thinking about their work
all day. These thoughts can be carried over into dreams.
Sometimes we wake up with a good feeling from a dream. But often we can"t remember the dream.
Dreams can disappear quickly from memory.
Too much dreaming can be harmful. The more we sleep, the longer we dream. The mind is hard at work
when we dream. This is why we may have a long sleep but we feel tired when we wake up.
B. a one-hour
C. a one-quarter
D. an eight-hour
B. Because they are not interested in their work.
C. Because they may be this thinking about their work all day.
D. Because they have too much work to do.
B. people like to sleep
C. dreams are like films
D. we always remember dreams
Dreams take up about one quarter of our sleeping time. People have several dreams each night. Dreams
are like short films. They are usually in colour. Some dreams are like old films. They come to us over and
over again. That may be because the dreamer is worrying about something. Dreaming may be a way of
trying to find an answer.
Some people get new ideas about their work from dreams. They may have been thinking about their work
all day. These thoughts can be carried over into dreams.
Sometimes we wake up with a good feeling from a dream. But of ten we can"t remember the dream.
Dreams can disappear quickly from memory.
Too much dreaming can be harmful. The more we sleep, the longer we dream. The mind is hard at work
when we dream. This is why we may have a long sleep but we feel tired when we wake up.
B. a one-hour
C. a one-quarter
D. an eight-hour
B. Because they are not interested in their work.
C. Because they may be this thinking about their work all day.
D. Because they have too much work to do.
B. people like to sleep
C. dreams are like films
D. we always remember dreams
- 1铁是一种应用广泛的金属。下列有关铁的叙述正确的是( )A.从历史上看,人类利用最早的金属是铁器B.铁与盐酸反应可
- 2【题文】下列太阳活动发生在光球层上的是A.耀斑B.黑子C.日珥D.太阳风
- 3用所给代词的适当形式填空。1. _____ is Chinese. (his) 2. This is Mark. ___
- 4(1)计算: . (2)解方程:8x3﹣27=0.
- 5如图甲为郑州某校学习小组所连接的实物电路图,电源电压为3 V,闭合开关,电压表示数为1 V,则灯泡L2两端的电压为
- 6给加粗的字写出正确的拼音。商酌( ) 伫立( ) 繁花嫩叶( ) 如法炮制( )
- 7饭后的一段时间许多营养物质被吸收,这时会引起胰岛素分泌量的( )A.增多,随后血糖下降B.减少,血糖随后上升C.增多,
- 8下列行为不会侵害公民隐私权的是( )A.公开他人身体缺陷B.公开他人的日记C.依法搜查公民住宅D.刺探他人私人信息
- 9不等式-3≤5-2x<3的正整数解是______.
- 10如图,点D是线段AB的中点,点C是线段AB的垂直平分线上的任意一点,DE⊥AC于点E,DF⊥BC于点F.(l)求证:CE
- 1有些传染病的发生与季节有关,消化道传染病多发生在[ ]A.春夏季节B.夏秋季节C.冬秋季节D.冬春季节
- 2下面是咏昭君出塞的一些诗,读读看,哪些是赞扬王昭君出塞的,哪些是贬斥她的?你的意见是什么? “汉武雄图载史篇,长城万里遍
- 3某种气体的摩尔质量为M g·mol-1,将标况下的该气体V L溶解在1000 g水中,该气体不与水反应,所得溶液密度为ρ
- 4在选举方式里,可以比较充分考虑当选者结构的合理性的选举方式是A.直接选举B.间接选举C.等额选举D.差额选举
- 5After the quake hit northeast Japan on March 11, many moving
- 6计算:(1)a5×a3×a=( ),(2)(a5)3÷a6=( ),(3)(﹣2x2y)3=(
- 7生物进化的许多环节还缺少化石证据,化石证据不够全面的原因可能是什么?______.
- 8如图,已知两个正方形ABCD 和DCEF不在同一平面内,M,N分别为AB,DF的中点。(1)若CD=2,平面ABCD⊥平
- 9物体在合外力作用下做直线运动的v-t图象如图所示.下列表述错误的是[ ]A.在0~2 s内,合外力做正功B.在0
- 10【题文】某飞行员驾机从A机场(30°N,120°E)起飞,为了经济省时,飞机必须沿最短航线飞往B机场(35°S,60°W