若|x-y-1|+(2-x)2=0,则xy=( )。

题型:填空题

问题:

若|x-y-1|+(2-x)2=0,则xy=(     )。

考点:有理数的乘方绝对值
题型:填空题
What day is __61___ day of the week? We Chinese may say Monday, because Monday is the first working day in the week. But__62___people have different ideas. They say__ 63___ is the first day of the week. Also, they work only five days a week and have a long __64___: Saturday and Sunday. People are different __65___ many other ways, too. We Chinese put our last names first and our first name last .British and American people put them in the other way. Chinese people speak Chinese, but British and American people speak English. Chinese eat a lot of__ 66___ . British and American people have a lot of bread and potatoes. Most Chinese ride bicycles, but most British and American people drive __67___. People write __68___ in different ways, too. We Chinese write “November 10, 2005” as “05 / 11 / 10”, in big -to - small order. But British put it as “___6 9__”, in small - to - big order, and the Americans even write it as “10/ 11 / 05”. What a difference!
Do you know any other __70___ between us Chinese speaking people and English speaking people.
小题1:
A.one B.firstC.the first D.a first
小题2:
A.speaking EnglishB.English speakingC.English spokenD.spoken English
小题3:
A.SundayB.SaturdayC.MondayD.Tuesday
小题4:
A.holidayB.timeC.weekdayD.weekend
小题5:
A.toB.byC.inD.from
小题6:
A.breadB.cropsC.riceD.corn
小题7:
A.busesB.carsC.taxisD.bikes
小题8:
A.datesB.daysC.monthsD.years
小题9:
A.05 / 10 / 11B.10 / 11 / 05 C.05 / 11 / 10D.11 / 10 / 05
小题10:
A.different B.more different C.differences D.difference
题型:填空题

一名射击手射击的命中率是50%,该射击手已经进行了两次射击,可能出现的结果会是哪些?

题型:填空题

轨道车联挂时,制动型式必须相同。联挂工作由专人负责,联挂完毕后,必须进行()试验,确认制动性能良好,方可行驶。

A、全列制动

B、制动缓解

C、列车管感度

D、三通阀灵敏感

题型:填空题

煤矿井下必须选用有“煤矿矿用产品安全标志”的矿用防爆电气设备。

题型:填空题

控制FADEC的A/T信号来源于()

A.FCU

B.FMGC

C.油门杆

D.A+B+C

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