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【多选题】
设向量a 的方向余弦满足 ,则以下说法中正确的是A.
向量平行于x轴
B.
垂直于x 轴
C.
平行与yoz平面
D.
垂直于yox 平面
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反馈参考答案：
举一反三
【单选题】What does the remark of the writer's friend imply?
A.
Waiters are usually skillful at talking with others.
B.
We should spend more time talking with our families.
C.
The good service of one culture may not suit people of another culture.
D.
People regard waiter's talk as one part of service.
【单选题】When mentioning 'the $4 million to $10 million range' in Paragraph 3, the author is talking about ______.
A.
gold market
B.
real estate
C.
stock exchange
D.
venture investment
【单选题】34 It is great fun
A.
looking at wives kissing their husbands.
B.
listening to students talking to their teachers.
C.
betting on the winners of each game.
D.
watching farmers kicking their donkeys.
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