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【简答题】
如图，己知O是坐标原点，B、C两点的坐标分别为（3，-1），（2，1）。 （1）以O点为位似中心在y轴的左侧将△OBC放大到两倍（即新图与原图的相似比为2），画出图形； （2）分别写出B、C两点的对应点B′、C′的坐标； （3）如果△OBC内部一点M的坐标为（x，y）， 写出M的对应点M′的坐标。
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举一反三
【简答题】When he was asked why he went there, he said he was sent there to be trained for a space flight. When ____why he went there, he said he was sent there to be trained for a space flight. (用分词)
【单选题】Why did the man go to the luggage office?
A.
He went there to get his case.
B.
He went there to see a friend.
C.
He went there to buy something to eat.
D.
He wanted to ask when the train was leaving.
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