售电量预测界面展示的数据是否包含下级机构数据信息（）A、包含所有下级机构数据 B、包

张三家在30°N上，张三先向正北方向走100km，然后向正东方向走100km，再向正南方向走100km，紧接着向正西方向走100km．请问最后张三在他的家哪个方位（　　）

A．正西

B．正东

C．刚好在家里

D．不能确定方向

基因在染色体上呈直线排列。[ ]

Dear Customers,

I love slipping (滑落) into a comfortable chair for a long read—as I relax into the chair, I also relax into the author’s words, stories and ideas. The physical book is so elegant that it disappears into the background, and what remains is the author’s world.

Today, we at Amazon are excited to announce Mindle, a wireless, portable reading device with instant access to more than 90,000 books, magazines and newspapers.

We’ve been working on Mindle for more than three years. Our top design objective was for Mindle to disappear in your hands—to get out of the way—so you can enjoy your reading. We also wanted to go beyond the physical book. Mindle is wireless, so whether you’re lying in bed or riding a train, you can think of a book, and have it in less than 60 seconds. No computer is needed—you do your reading directly from the device.

We chose the same wireless technology used in advanced mobile phones. But unlike mobile phones, there are no monthly wireless bills, no service or data plans, and no yearly contracts. There is no software to install (安装，设置)。 We want you to get lost in your reading and not in the technology.

Mindle uses a new kind of display called electronic paper. Sharp and natural with no strong light, reading on Mindle is nothing like reading from a computer screen. Mindle weighs only 10.3 ounces—less than paperback—but can carry two hundred books.

Enjoy learning about Mindle and many thanks!

Jeff Bezos Founder & CEO

小题1:This passage most probably is a(n)________.

A．advertisement

B．news story

C．lab report

D．letter of thanks小题2:From the passage we learn that Mindle is a device which ________.

A．has neither wires nor weight

B．is operated by a computer

C．disappears while you read

D．can find a book within one minute小题3:With the device, the reader is able to ________.

A．enjoy reading when driving a car

B．improve reading skills

C．gain access to free software

D．get rid of heavy books made of paper小题4:Different from mobile phones, Mindle________.

A．has a much more friendly screen

B．can work in the absence of electricity

C．doesn’t involve regular bills

D．is wireless and can be used anywhere.

设字长n=8位，[X]补码=（A4）₁₆，[Y]补码=（9B））₁₆，，则求[X+Y]补码时得到的结果和溢出标志OF分别为（）。

A.（13F）₁₆和OF=0

B.（3F）₁₆和OF=0

C.（13F）₁₆和OF=1

D.（3F）₁₆和OF=1