调解可以分为（）．

Write a note of about 50 ~ 60 words based on the following situation: The final exam is over. You want to go for a picnic to relax this weekend and ask Lily, your best friend, to go with you. Write a note, asking whether she is interested and telling her your plan including the time, place, and things needed for the picnic. Marks will be awarded for content, organization, language and appropriateness. 点击查看答案

接到订单，小范开始对电脑组装，开开始工作速度比较慢，后经过培训后，每天组装20台，照这样的速度可以提前1天完成。可由于他工作4天后，对技术进行了改进，每天可多组装5台，结果提前3天完成了订单，问这批订单的数量有多少台?（ ）。A．260 B．280 C．270 D．300

A.260
B.280
C.270
D.300

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