填空题

The article gives us a real insight _________________ (对于当前经济危机的起因).

【参考答案】

into the causes of the present economic crisis
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Blay Whitby pointed out that people only began to be aware of the safety issue ______.
A．when household robots were invented
B．when robots were in wide use
C．after some grave accidents
D．ten years or so ago
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How is hawk’s eyesight better than ours
A．It can identify small items more quickly than we do.
B．It can see at a longer distance than we do.
C．It has more cones in the retina than we do.
D．h has bigger eyes than we do.
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