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【单选题】
一个矢量 ,则下列说法正确的是( )。A.
的大小为
B.
与x轴的方向余弦为
C.
在z轴的投影为2
D.
的大小为25.
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举一反三
【单选题】Why was the film director interested in Larry?
A.
He was amused by Larry’s unusual way of recommending himself.
B.
He thought Larry would make a good actor.
C.
He was sorry for Larry.
D.
He didn’t want Larry to be employed by other companies.
【单选题】Which of the following statements about Larry can be inferred?
A.
Larry was an idealistic dreamer.
B.
. Larry had a fine sense of humor.
C.
Larry was going to be a great movie star.
D.
Larry was broke when he met the film director.
【单选题】What is probably true about Larry?
A.
Larry usually helps others to prepare for the test.
B.
Larry surprised us with his grade.
C.
Larry knew how to solve the mystery.
【简答题】. Larry Walters’boyhood dream was to fly. After finishing school, Larry joined the U.S. Air Force, but was refused from pilot-training school because of poor eyesight. However, his dream remained. Lar...
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