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问题 填空题

A.条件（1）充分，但条件（2）不充分.

B.条件（2）充分，但条件（1）不充分.

C.条件（1）和（2）单独都不充分，但条件（1）和条件（2）联合起来充分.

D.条件（1）充分，条件（2）也充分.

E.条件（1）和（2）单独都不充分，条件（1）和条件（2）联合起来也不充分.

m为偶数．（）
(1)m=n(n+1)，n∈Z；
(2)在1，2，3，…，90这90个自然数中的相邻两个数之间任意添加一个加号或减号，设这样组成的运算式的结果是m．

答案

参考答案：A

解析：

[提示] 条件(1)中，m为两个相邻整数积，而两相邻整数必一奇一偶，m为偶数，条件(1)充分．条件(2)中，奇数个奇数相加减结果是奇数，偶数个奇数相加减结果是偶数，1到90中有45个奇数，因此m作为这个运算式的结果为奇数，条件(2)不充分．故选(A)．

阅读理解

One day Trudy saw an advertisement in a magazine. It offered a packet of 100 mixed stamps for $10. Trudy wanted to start a stamp collection so she ordered the packet. One hundred mixed stamps seemed a good way to begin a collection. She sent a postal order to the stamp company with her order, and waited excitedly for the stamps arrived. Trudy checked the mail every day for four weeks but the stamps didn’t arrive. So Trudy decided to write to the company. “Dear Sir/Madam,” she wrote, “a month ago I sent you a postal order for $10 as payment for 100 mixed stamps. They haven’t arrived. Please send them by return of mail.” another month passed. The stamps still didn’t arrive and she didn’t receive any replay to her letter. She asked her father for advice. Her father said, “You must write a stronger letter. Make the stamp company worry that you will report them to the authorities.” “Dear Sir/Madam,” she wrote in her second letter. “I am writing to complain about your poor service. Two months ago I sent you a postal order for $10 as payment for 100 mixed stamps. I didn’t receive the stamps. A month ago I wrote to inform you of this. I still haven’t received the stamps, and you haven’t replied to my letter. If I do not receive the stamps within seven days. I shall report this matter to the authorities.” Two days later Trudy received the stamps in the mail.

小题1:Trudy ordered the stamps because _______.

A．it seemed a good way to start a stamp collection

B．she wanted to give them to her father

C．she need them to mail some letters

D．she thought they were cheap小题2:Trudy paid for the stamps with ________.

A．cash

B．a check

C．the credit card

D．a postal order小题3:Trudy checked the mail every day for ______.

A．4 months

B．a week

C．a month

D．for 3 weeks小题4:In her second letter Trudy complained about how _______.

A．expensive the stamps were

B．boring the stamps were

C．poor the company’s service was

D．slow the postal service was小题5:Trudy received the stamps ______ after she sent the second letter.

A．a week

B．a month

C．two months

D．two days
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单项选择题

农民甲因其邻居乙越界建房侵入自己的宅基地而诉请法院保护，乙的行为侵犯了甲的何种权利( )

A．相邻权

B．住宅所有权

C．宅基地使用权

D．宅基地所有权
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