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【单选题】
Why is the man glad?A.
Because his budget is tight
B.
Because they could sign the contract
C.
Because he could buy goods in bulk
D.
Because his company did well this year
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【简答题】光敏电阻的暗态前历一般比亮态前历的响应时间 。（长/短）
【单选题】Thousands of animal lives would be ______ daily if we just eat vegetables.
A.
spared
B.
freed
C.
escaped
D.
released
【单选题】We should eat a lot of fruit and vegetables ___________ . [ ]
A.
having good health
B.
to stay healthy
C.
keep in good health
D.
stay healthy
【简答题】设随机变量 ，则 的值为_____.
【单选题】Health is very important to us, We should eat more vegetables and fruit instead of _____ rich food. [ ]
A.
too much
B.
much too
C.
very much