问答题

简答题 You should write about 40 minutes on the
Write about the following topic:
Nowadays, some people like to give help to the local community or provide people with direct help. Other people prefer to give money to national and international organisations.
Discuss both methods and give your own opinion on which is better.
Give reasons for your answer and include any relevant examples from your own knowledge or experience.
Write at least 250 words.

【参考答案】

Whilst I think that giving help in any form. is worthwhile, ......

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Not until quite recently （）he gave up his plan to go abroad.

A．I knew
B．I had known
C．did I know
D．I did know
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Why Is it So Difficult to Swat a Fly？The brains of flies are wired to avoid the swatter，US researchers said on Thursday.At the mere hint of a threat，the insects adjust their preflight stance to flee in the opposite direction，ensuring a clean getaway，they said in a finding that helps explain why flies can so easily evade swipes from their human foes.’These movements are made very rapidly，within about 200milliseconds，but within that time the animal determines where the threat is coming and activates a set of movements to position its legs and wings，’Michael Dickinson of the California Institute of Technology said in a statement.’This illustrates how rapidly the fly’s brain can process sensory information into an appropriate motor response，’said Dickinson，whose research appears in the journal Current Biology.Dickinson’s team studies this process in fruit flies using high-speed digital imaging equipment and a fancy fly swatter.In response to a threat from the front，the fly moves its middle legs forward，leans back and raises its back legs for a backward takeoff.If the threat is from the side，the fly leans the other way before takeoff.The findings offer new insight into the nervous system of the fly，and lends a few clues on how to outsmart them.Dickinson，a bioengineer，has devoted his life’s work to the study of insect flight.He has built a tiny robotic fly called Robofly and a 3-D visual flight simulator called Fly-O-Vision.
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