问答题

It is essential__________(文件在这个周末前递交)．

【参考答案】

that the document (should)be handed by this weekend
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单项选择题
According to the passage, the risk of prostate cancer would be lowered by________ among those who consumed raw tomatoes more than once a day.
A．21 to 34 percent
B．30 to 60 percent
C．21 to 30 percent
D．34 to 60 percent
问答题
48. What is Georges Valensi’’ s invention
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