题目内容
（请给出正确答案）
A.Seen
B.Seeing
C.Having seen
D.To see
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更多“_____ from space, we can find …”相关的问题
From the passage we can see that astronomy is ______.
A．the life experience of great men
B．the movement of the stars and the planets
C．the scientific study of natural objects in space
D．the theories developed by scientists of old times
We know from the passage that ______.
A．exposure to even tiny amounts of radiation is fatal
B．the effect of exposure to radiation is slow in coming
C．radiation is avoidable in space exploration
D．astronauts in spacesuits needn't worry about radiation damage
We can infer from the second paragraph that______.
A．answers to the origin of the moon have been found out at last
B．scientists are eager to send more astronauts to space
C．technology helped scientists understand the universe more and better
D．astronauts could not return to the earth without the help of scientists
We know from the passage that________．
A.the effect of exposure to radiation is slow in coming
B.exposure to even tiny amounts of radiation is fatal
C.radiation is avoidable in space exploration
D.astronauts in spacesuits needn’t worry about radiation damage
Humans may not have landed on Mars (火星) just yet, but that isnt stopping a European company from devising a plan to send four people to the Red Planet within the next few years. (78)This project, called Mars One, aims to send a small group of people to Mars in 2022and eventually establish a permanent colony on the planet. "Everything we need to go to Mars exists," said Mars One co-founder Bas Lansdorp in March 2014. "We have the rockets to send people to Mars, the equipment to land on Mars, the robots to prepare the setdement for humans. For a one-way mission, all the technology exists. " Yet the four astronauts (宇航员) chosen for the trip will be stuck on Mars—forever. And despite Mars Ones thorough planning, there are a number of challenges that may prevent the mission from ever taking place. (79)The biggest road block could be the missions huge cost ($ 6 billion). However, Lansdorp is confident that Mars One will be able to fund the project by selling the broadcast rights for the mission and subsequent experiences living on the planet. Those broadcast rights will also play a part in helping to select the people who will be sent to. Lansdorp said the company will hold a selection process similar to a reality show. Lansdorp is expecting at least 1 million applications from people around the world. In addition to the cost, several other potential problems could inhibit (阻止) the mission to Mars. " Its even more challenging to send people there with life support, with food, with air, with all the other things like books, entertainment, means of communication and of providing for their own resources for a long stay on Mars," said Adam Baker—senior lecturer in space engineering at Kingston University in London. "The sheer size of the rockets youd need to do this would be absolutely colossal. "
According to Project Mars One, humans could send four people to Mars within the next ______years.
A．seven
B．eight
C．ten
D．six
Even if you are a good high-jumper, you can jump only about seven feet off the ground. You cannot jump any higher because the earth pulls you hard. The pull of the earth is called gravity.
You can easily find out the pull of the earth. If you weigh yourself, you will know how much gravity is pulling you.
Since there is gravity, water runs down hill. When you throw a ball into the air, it falls back down. Because of gravity, you do not fall off the earth as it whirls(旋转) around.
Then, can we get away from the earth and go far out into space？ Now you can do it, because spaceships have been invented. Then spaceship will go so fast that it can escape the earth’s gravity and carry you into space.
(1) In this passage, the word “gravity” means_______.
A.the pull of everything.
B.the force of attraction(吸引) among objects.
C.the force which attracts objects towards the centre of the earth
D.the force which attracts the earth towards the sun.
(2) When you slip you always fall to the ground because_______.
A.the earth always turns round.
B.the earth has gravity
C.the earth’s gravity is greater than your weight.
D.you are careless.
(3) Gravity is strong that_______.
A.it can throw a ball into the air.
B.it makes you jump only seven feet.
C.it can let you fly away from the earth.
D.it can keep everything on earth.
(4) Because of gravity,_______.
A.water flows everything.
B.we can go everywhere by ship.
C.water always flows downwards.
D.fish can live in water.
(5) We can get away from the earth by spaceship because_______.
A.the spaceship goes very fast.
B.the earth can’t pull the spaceship.
C.the spaceship has a strong force.
D.the spaceship can jump higher than other things.
A.can, except
B.can, in
C.cannot, unless
D.cannot, until
A.scheduled
B.published
C.requested
D.conducted
A.错误
B.正确
It can be inferred from the passage that ______. ()
A．the Apollo mission was very successful
B．protection from space radiation is no easy job
C．astronauts will have deformed children of grandchildren
D．radiation is not a threat to well protection space explorers
