用反证法证明命题“若实数a、b满足a+b=12,则a、b中至少有一个数不小于6”

题型:填空题

问题:

用反证法证明命题“若实数a、b满足a+b=12,则a、b中至少有一个数不小于6”时,第一步应先假设所求证的结论不成立,即为______.

考点:命题,定理
题型:填空题

基金管理公司为单一客户办理特定资产管理业务的,客户委托的初始资产不得低于2亿元人民币。 ( )

题型:填空题

“自动”出口配额制

题型:填空题

The winds had finally died down,and the rains stopped.Paige and her parents were inside their house,sitting in the living room,which was dark except for a single candlelight.

“Let’s find out what’s going on outside,”Paige’s mom suggested as she turned on the small radio.

“…has moved out of the area,”an announcer’s voice boomed. “Winds reaching nearly 100 miles an hour passed through our town this morning. But,the worst is over,and it is safe to go outside.In fact,the sun is now peeking out from behind the…”

Suddenly,the radio went dead.The house was quiet again.

“Well,”Paige’s dad said, “at least we heard some good news,even if it was cut short.Let’s look out of the window and survey the damage.”

Paige ran to the window and looked outside.She saw tree branches lie on the lawn.The mailbox was broken,and some of the address letters and numbers on the mailbox were missing.

“The wind must have ripped(擦)them off,” Paige’s father noted.As he read the remaining letters he began to laugh.

The mailbox dispalyed “_ _RAIN.”

“It says “rain”,”Paige said. “That’s appropriate for a day like today!”

小题1:The weather event that took place that day in the story was        .

A.an earthquake

B.a hurricane

C.a flood

D.a fire小题2:The living room was dark because           .

A.there were no lamps

B.someone forgot to pay the electric bill

C.the electricity had been cut off

D.the wind blew out the candle小题3:After the storm had passed,Paige’s family felt           .

A.worried

B.disappointed

C.relieved

D.scared小题4:The family’s last name could have been          .

A.Germain

B.Crain

C.Syrain

D.Rain

题型:填空题

杰斐逊的宪政民主理论包含的原则有()。

A、人民主权原则

B、民主性原则

C、多数原则

D、分权与制衡原则

题型:填空题

当液货船的透气采用高速排气方式时,排气出口应布置在液货甲板以上高度至少()米。

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