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2.如果一条直线和一个平面垂直,则称此直线与平面构成一个“正交线面对”,在一个正方体中,由两个顶点确定的直线与含有四个顶点的平面构成“正交线面对”的概率为  3/28 

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1.值域为,其对应关系为的函数个数为  27  

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15、The population of China   over 1,200 million and eighty percent of the population    peasants.

A、is;are   B、are;is   C、is;is    D、are;are

1-----5BBBDA      6----10AACAC      11----15CDACC

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14、A series of debates between the major candidates    scheduled for the Labor Day weekend last week.

A、is    B、are    C、was     D、were

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13、Five multiplied by two    ten.

A、is equal   B、equals   C、equal with    D、equal to

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12、   neither you nor your brother interested in swimming?

A、Are     B、Is    C、Do     D、Does

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11、It’s not you but Mr Anderson who    to answer    the incident.

A、are;for    B、were;to    C、is;for    D、was;back

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10、    of the land in that district    covered with trees and grass.

A、Two fifth;is   B、Two fifth;are    C、Two fifths;is     D、Two fifths;are

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9、Up to now,the majority of the undergraduates    enrolled for this selected course.

A、has been   B、have   C、had been    D、would have been

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8、I don’t think one hundred dollars    a big sum of money to him.

A、will be   B、would be   C、is    D、are

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