《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
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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)
当检索词a 、b 、c 为相互限制关系时,查准率最高的布尔逻辑检索式是()分析:相互限制——交叉概念(逻辑“与”)提示: “非”是排斥
A. a AND b AND c
B. a OR b AND c
C. a 或者 b 非 c
D. a 与 b 非 c
There is a yellow small wooden table. (×) →There is a _____ _____ _____ table.(√)