△ABC中,∠A=120°,∠B=2∠C,则∠B=( )。

题型:填空题

问题:

△ABC中,∠A=120°,∠B=2∠C,则∠B=(    )。

考点:三角形的内角和定理
题型:填空题

下面各数中,可以用来证明命题“任何偶数都是8的倍数”是假命题的反例是(  )

A.9

B.8

C.4

D.16

题型:填空题

如图所示为一物体沿南北方向(规定向北为正方向)做直线运动的速度--时间图象,由图可知

A.3 s末物体回到t=0时的位置

B.3 s末物体的加速度方向发生变化

C.物体所受合外力的方向一直向北

D.物体所受合外力的方向一直向南

题型:填空题

日志文件是用来记录对数据库的每一次更新活动的文件,当数据库系统发生故障时,可以利用它来进行恢复。下面列出的条目中不属于日志记录的内容的是 ( )

A.事务开始信息

B.事务更新信息

C.事务提交信息

D.事务地址空间

题型:填空题

A time capsule buried by Apple founder Steve Jobs 30 years ago has been discovered after its location was long forgotten.In 1983, the young tech innovator was attending a conference in Aspen when he and the group decided to bury as a stunt during a design convention.

The tube that was filled with an eclectic collection of goods- ranging from the then-new apple mouse to a six-pack of beer for the people who discovered the time capsule- was meant to be dug up 20 years later.

There was a problem with that plan, however, as everyone involved forgot where it was buried.

The final discovery happened at the hands of the crew from the National Geographic Channel`s reality show called Diggers.The discovery was well documented and is surely going to be featured on an upcoming episode, and even the experts had problems finding this particular treasure.

CNET reports that in spite of their preparations and clear idea of where the 13-foot-long tube was, it still took them two hours to dig it up using heavy machinery.

To anyone removed from the tech industry, the accomplishment in finding the tube appears to be the biggest accomplishment. To others, the most interesting object would likely be the `Lisa` mouse placed in the tube by the hands of a then-28-year-old Jobs.The Lisa Mouse, which Jobs named after his daughter, was one of the first commercial computer mice soled publicly, making it a rarity at the time.

The Aspen Historical Society is going to help the show creators catalogue the tube`s contents- but no word yet whether or not the Diggers cracked open one of the six bottles of Boddington`s Ale that was left inside for the people who found the tube.

小题1:Who found the time capsule buried by Steve Jobs?

A.Apple founder Steve Jobs himself.

B.the crew from the National Geographic Channel`s reality show called Diggers.

C.Steve Jobs' friends.

D.Steve Jobs’ daughter.小题2:Which is the best title of the passage ?

A.A time capsule buried by Apple founder Steve Jobs.

B.Steve Jobs' plan.

C.Steve Jobs' time capsule is uncovered.

D.The tube by Steve Jobs.小题3:How old is Steve Jobs now?

A.58 years old .

B.20 years old.

C.30 years old.

D.48 years old.

题型:填空题

可用于空气熏蒸的一组消毒剂是

A.甲醛加高锰酸钾

B.戊二醛加碳酸氢钠

C.氯胺T或0.5%漂白粉

D.苯扎溴铵加0.5%亚硝酸钠

E.煤酚皂加开水

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