The phrase "common room" in "He spends his days there writing, seeing students or taking tea with them in the drab common room" means
A. a room with toilets that is in a public place, for example in a restaurant
B. a room in a school or college where students or teachers can sit together and talk when they are not working.
C. a conferencd room
D. a classroom that can accomodate a great many students
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The phrase "Silent scorn" in "Anyone trying to finish his sentence for him feels the silent scorn of that imperturbably flicking finger" implies
A. Hawking is silent to those who wants to help him.
B. Hawking is very cynicic.
C. Hawking does not want to rely on others to handle daily communications.
D. Hawking is very hard working in handling daily communications.
Which of the following is not a reason that people who depends on Hawking 's approval, is maddened by his handicap?
A. His voice is synthetic so it is lack of feelings.
B. His facial expression can be interpreted in a number of ways.
C. His grin is tricky.
D. He is very assertive.
In the last paragraph, the author implies that
A. It is easier for students to figure out what Hawking says.
B. Hawking condition makes it hard for him to work creatively.
C. ALS doesn't affect any aspects of Hawking's work and life.
D. For his whole life, Hawking wanted to understand the universe and why it exists.
利用GPS定位时，地面上任何一点，在任一时刻，地面上空至少要有几颗卫星？
A. 1颗
B. 2颗
C. 3颗
D. 4颗
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