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Now they are ready to solve many problems of space travel, from guidance and____ to flight dynamics of missiles beyond the earth's atmosphere.(1分)
A
direction
B
instruction
C
technique
D
navigation
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D
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22.Another thing an astronaut has to learn about is eatingin space.Food is weightless, just as men are. Food for space has to be packed in special ways.Some of it goes into tubes that a man can squeeze into his mouth.Bite-sized cookies are packed in plastic. There is a good reason for covering each bite, The plastic keeps pieces of food from traveling in the spaceship.On the earth very small pieces of food would simply fall to the floor. But gravity doesn't pull them to the floor when they are out of the plastic in a spaceship.They move here and there and can get into a man's eyes or into the spaceship's instruments.If any of the instruments is blocked, the astronauts may have trouble getting safely home. As astronauts travel on longer space trips, he must take time to sleep.An astronaut can fit himself to his seat with a kind of seat belt.Or, if he wants to, he can sleep in a sleeping bag which is fixed in place under his seat.But be careful he must put his hands under the belt when he goes to sleep.This is because he is really afraid that he might touch one of controls that isn't supposed to be touched until later.22.1 Why would astronauts cover each bite of food in space?A.Because small pieces of food would fall down to the floorB.Because weightless pieces of food might make trouble when they travel aroundC.Because they haven't enough food for longer tripsD.Because astronauts don't want to waste food
The news ________they had won the game soon spread over the whole school.(1分)
24. Early in my travels, I had noticed these“new things” under the sun, and since they occur in increasing numbers all over the nation, it is interesting to observe them. From the beginning of my travels I had noticed the sale lots where they were sold and traded, but then I began to be aware of the parks where they sit down in uneasy permanence.By talking to the managers of the parks and to the dwellers in this new kind of housing, I got to know that these trailers are wonderfully built homes. Some of them are even forty feet long and they have two to five rooms, and are complete with air-conditioners, toilets, baths, and televisions. The parks where they sit are equipped with every facility. When a mobile home is drawn to the trailer park (活动住屋的停车场)，water and electric power will be connected and the television antenna raised, and then the family settle down.The park men charge a small ground rent plus fees for water and electricity. Telephones are connected in nearly all of them simply by plugging in a jack (插座). Sometimes the park has a general store for supplies, if there are no supermarkets nearby. Parking difficulties in the towns have caused these trailers to move to the open country where they don’t have to pay town taxes. The fact that these homes can be moved does not mean that they do move. Sometimes their owners stay for years in one place. It is a totally new and appealing way of life to me. These homes are never cheap and often are quite expensive with all the thousand appliances we live by—dishwashers, automatic clothes washers and driers, refrigerators.(10分)24.1 The author noticed the “ new things” (Para.1）when .(2分)A. he worked in the countryB. he traveled on a sunny dayC. he traveled around the country D. he tried to talk to manager in the park
Most of the experiments ________ in this biomedical book seem easy to perform.(1分)
22.5 What is the best title for this passage?(2分)
21.5 The use of authentic materials is going to be discussed .(2分)
To begin the presentation, let’s take an _______ of the previous study of the topic.(1分)
Generally speaking the ______ place a person stands, the ______ place he can see.(1分)
An unhappy childhood may have some negative effects on a person’s characters however, they are not always _________．(1分)
3.4 Which of the following is NOT correct?____(1分)
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