题目内容

一般木材在()℃燃烧,木炭在()℃燃烧。

A. 500,2000
B. 600,1500
C. 800,2500
D. 700,1100

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《地球创世纪》水,其中介绍,尼罗河的源头在(),以()为主。最终尼罗河携带大量的淤泥,堆积在河流两岸。

A. 苏丹,岩浆岩
B. 尼日利亚,沉积岩
C. 肯尼亚,沉积岩
D. 埃塞俄比亚,岩浆岩

《地球创世纪》水,其中介绍,由于有地下水的存在,坚硬的地球更像是()。

A. 一枚生鸡蛋
B. 一颗果冻
C. 一杯奶茶
D. 一块海绵

The _(1)_ _(2)_ _(3)_ (driverless; wonderful; new) car of 2060 looks very different from the cars we see on our streets today. There is no longer any need for the traditional seating arrangement of a driver’s seat and passenger seats. The car of the future is circular with _(4)_ _(5)_ _(6)_(soft; comfortable; leather) seats which group round a central entertainment area. In boxes under the seats, there are _(7)_ _(8)_ _(9)_ (beautiful; thick; fluffy) blankets and _(10)_ _(11)_ _(12)_ (white; clean; goose-feather) pillows, so that passengers can catch up on sleep. In the middle of the entertainment area, passengers can watch movies or play videogames. Driving is no longer a chore; it is a _(13)_ _(14)_(relaxing; fun) experience!

如果a和b 为同义词,c用来限制a和b ,正确的布尔逻辑表达式是提示:括号()为强制优先运算符。1,注意空格2,运用优先算符()3,为什么?

A. ( a OR b ) AND c
B. a OR (b AND c)
C. a OR (b OR c)
D. a AND(b OR c)

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