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问题 填空题

已知x﹣y=6，xy=﹣3，则xy2﹣x2y=　 　．

答案

18

解：xy2-x2y=xy（y-x）=-3×（-6）=18，

本题考查了提公因式法分解因式，准确找出公因式是解题的关键，然后整体代入计算．

填空题

短文填词。

     There are (1)s            students in my group. Sam's birthday is in (2)J           . It's the first (3)m          

 of the year. Ruth's birthday is in (4)M           . It's after Women's Day. Jack was born on (5)J             1.

It's also Children's Day. Will and Tina were born in the (6)t            month-(7)O           . They are proud

(自豪的) they have the same (8)b            as our country. My birthday is in the last month-(9)D           .

(10)W            is your birthday? Can you tell us?

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多项选择题

根据《电力工程建设项目安全生产标准化规范及达标评级标准（试行）》（电监安全[2012]39号）5.7.1.1节规定，工程（）在审核设计变更时，应分析变更可能引起的安全风险，提出风险评价的意见。

A.建设单位

B.施工单位

C.监理单位

D.总承包单位
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