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BEING an astronaut sounds cool, doesn’t it? In space, they get to do some pretty amazing things, like floating in zero gravity (重力).
However, there are also plenty of things that astronauts can’t do because of their weightless environment, and that’s very sad. What’s worse, they can’t even let their sadness show – because it’s impossible to cry in zero gravity.
Of course, astronauts can still produce tears. But crying is much more difficult in space, reported The Atlantic in January. Without gravity, tears don’t flow downward out of the eyes like they do here on Earth. This means that when you cry in space, your tears have nowhere to go – they just stick to your eyes.
In May 2011, astronaut Andrew Feustel experienced this during one of his spacewalks. “Tears,” he said, “don’t fall off of your eye... They just kind of stay there.”
Besides making your vision unclear, this can also cause physical pain. Back on Earth, tears are supposed to bring comfort to the eyes. But that’s not the case in space. The space environment dries out astronauts’ eyes, and when tears suddenly wet the eyes, it can cause pain rather than comfort. “My right eye is painful like crazy.” Feustel told his teammate during the walk.
Since gravity doesn’t work in space, astronauts need some extra help to get rid of the tears. Feustel chose to rub his eyes against his helmet to wipe the tears away. Another choice is to just wait – “When the tears get big enough they simply break free of the eye and float around,” astronaut Ron Parise told The Atlantic.
There are lots of small things – things like crying – that we are so used to on Earth. We usually take them for granted, until they become a problem in a totally different environment, like space. There, astronauts can’t talk to each other directly. They also can’t eat or drink in normal ways. They can’t even burp (打嗝), because there is no gravity to hold the food down in their stomach. If they do burp, they just end up throwing up (呕吐) everything in their stomach, according to the UK National Space Center.
Thus, perhaps it’s only space explorers who can honestly say: “Gravity, you’re the best.”
50. What can we conclude from paragraphs 2 and 3?
A. Astronauts are unable to feel sad in space.
B. Astronauts produce fewer tears in space.
C. Tears produced in space flow down more slowly.
D. Tears produced in space don’t flow downward.
51. What effect do tears have on astronauts?
A. They cause physical pain.
B. They bring comfort to them.
C. They make their vision clearer.
D. They float around and cause trouble.
52. What can the astronaut do to get rid of the tears?
A. Rub his eyes against his helmet to let the tears float forward.
B. Rub his eyes by hand to let the tears float around.
C. Get the tears big enough to fall off of his eyes.
D. Get the tears big enough to break away from his eyes.
53. What’s the second-to-last paragraph mainly about?
A. Suggestions on how astronauts can stay comfortable in space.
B. Other basic things that are difficult to do in space.
C. Why burping is impossible in space.
D. Things that humans can’t do without gravity.
54. When of the following can be the best title for the text?
A. In the sky, you can’t burp
B. Better life with gravity
C. In the sky, you can’t cry
D. No Gravity, no tears
查看习题详情和答案>>It was in the hospital that I first saw Tommy.
He must have been crying a lot __21_ his chest was still heaving（起伏）as I __22_ the bed. I knew he was trying to __23_ his tears. I felt helpless, unable to __24_ the pain from the little boy. Suddenly an idea hit me. I wanted to __25_ him the ancient Hawaiian wisdom. __26_ over, I whispered, “Tommy , did you know our Hawaiian Lizards（蜥蜴）grow their tails back and little boys can grow their __27_ back too?” Tommy’s eyes grew wide with __28_ .
“They can?” he asked, obviously __29_ .
“Yes!” I answered with __30_ . “Close your eyes,” I said. He nodded with his eyes closed __31_ .
“Tell your finger every day how much you love it and you need it to __32_ the phone and to write your homework in school.” I paused, __33_ his little face focused in deep __34_ . “Now say, grow for me, finger. I love you. I need you so much.” __35_ later, Tommy opened his eyes. I told him, “Your finger will be perfectly fine. Let’s __36_ until it completely recovers.”
A year later, Tommy came to say good-bye to me. His broken finger was just the same as any other finger should be. Only a(n) __37_ scar（伤疤）remained.
Tommy remains forever in my heart and __38_ me of the possibility of miracle（奇迹）. From him, I have learnt to _39_ failure. He inspires me to improve myself and to remember the ancient __40_ : Everything is possible if you truly believe.
1.
A. so B. but C. because D. or
2.
A. left B. approached C. touched D. saw
3.
A. flow out B. wipe out C. hold up D. hold back
4.
A. remove B. move C. stand D. suffer
5.
A. amuse B. teach C. inspire D. treat
6.
A. Turning B. Watching C. Looking D. Bending
7..
A. hands B. arms C. fingers D. feet
8.
A. ease B. excitement C. fright D. disappointment
9.
A. tired B. confident C. astonished D. worried
10.
A. certainty B. pride C. honesty D. pleasure
11.
A. slightly B. firmly C. loosely D. straight
12.
A. call B. answer C. dial D. receive
13.
A. changing B. noticing C. washing D. covering
14.
A. sadness B. fantasy C. regret D. attention
15.
A. Years B. Weeks C. Minutes D. Hours
16.
A. stay B. stop C. wait D. rest
17.
A. fine B. ugly C. terrible D. big
18.
A. warns B. reminds C. educates D. shows
19.
A. forget B. accept C. refuse D. challenge
20.
A. game B. lesson C. wisdom D. truth
查看习题详情和答案>>
It was in the hospital that I first saw Tommy.
He must have been crying a lot __31_ his chest was still heaving（起伏）as I __32_ the bed. I knew he was trying to __33_ his tears. I felt helpless, unable to __34_ the pain from the little boy. Suddenly an idea hit me. I wanted to __35_ him the ancient Hawaiian wisdom. __36_ over, I whispered, “Tommy , did you know our Hawaiian Lizards（蜥蜴）grow their tails back and little boys can grow their __37_ back too?” Tommy’s eyes grew wide with __38_ .
“They can?” he asked, obviously __39_ .
“Yes!” I answered with __40_ . “Close your eyes,” I said. He nodded with his eyes closed __41_ .
“Tell your finger every day how much you love it and you need it to __42_ the phone and to write your homework in school.” I paused, __43_ his little face focused in deep __44_ . “Now say, grow for me, finger. I love you. I need you so much.” __45_ later, Tommy opened his eyes. I told him, “Your finger will be perfectly fine. Let’s __46_ until it completely recovers.”
A year later, Tommy came to say good-bye to me. His broken finger was just the same as any other finger should be. Only a(n) __47_ scar（伤疤）remained.
Tommy remains forever in my heart and __48_ me of the possibility of miracle（奇迹）. From him, I have learnt to __49_ failure. He inspires me to improve myself and to remember the ancient __50_ : Everything is possible if you truly believe.
31. A. so B. but C. because D. or
32. A. left B. approached C. touched D. saw
33. A. flow out B. wipe out C. hold up D. hold back
34. A. remove B. move C. stand D. suffer
35. A. amuse B. teach C. inspire D. treat
36. A. Turning B. Watching C. Looking D. Bending
37. A. hands B. arms C. fingers D. feet
38. A. ease B. excitement C. fright D. disappointment
39. A. tired B. confident C. astonished D. worried
40. A. certainty B. pride C. honesty D. pleasure
41. A. slightly B. firmly C. loosely D. straight
42. A. call B. answer C. dial D. receive
43. A. changing B. noticing C. washing D. covering
44. A. sadness B. fantasy C. regret D. attention
45. A. Years B. Weeks C. Minutes D. Hours
46. A. stay B. stop C. wait D. rest
47. A. fine B. ugly C. terrible D. big
48. A. warns B. reminds C. educates D. shows
49. A. forget B. accept C. refuse D. challenge
50. A. game B. lesson C. wisdom D. truth
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