九年级(1)班有男生25名,女生25名,现需要选取一名同学首先值日,用计算器模拟

题型:选择题

问题:

九年级(1)班有男生25名,女生25名,现需要选取一名同学首先值日,用计算器模拟实验时,产生随机数的范围是(  )
A.1~25B.0~25C.1~50D.0~50
考点:二次函数的最大值和最小值
题型:选择题

下图的赔偿期是()。

A.a

B.b

C.c

D.d

题型:选择题
阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
In the United States there was an unusual story telling of the daughter of an engineer.One day 36 walking along the bank of a lake, the girl happened to see 20 eggs laid by a wild goose.After some time the girl_37_the mother would not return to the eggs and she  38 to take them home.There she carefully  39 the eggs in the heat of a lamp.Several days  40 , the eggs broke and the baby geese came into the  41 Geese are known to take the first living thing 42 they see as their mother.Thus, to these  43 geese, the girl was their mother.
As they grew, the girl was able to  44 her birds to run across the grass, but she could not teach, them to _45_.The little girl became increasingly worried about this, both when  46 and in her dreams.Suddenly, she thought_47_a clever idea: she would fly a plane to guide them in 48 .She asked her father for a plane and he made a small one for her.Caring about  49 safety, the father Hew the plane himself.However, the birds didn't  50 him.They all slept in the grass 51 .      
The girl was so worried about it that one day the girl_52_into the plane and started it.Soon the plane left the_53_.Seeing their mother in the air, the birds 54 expanded their wings and   55  She flew the plane freely in the sky, with her young birds following.
小题1:
A.sinceB.afterC.whileD.because
小题2:
A.realizedB.expectedC.imaginedD.admitted
小题3:
A.helpedB.decided C.affordedD.agreed
小题4:
A.placedB.protected C.treatedD.examined
小题5:
A.agoB.outC.laterD.long
小题6:
A.familyB.houseC.homeD.world
小题7:
A.what B.which C.thatD.who
小题8:
A.greatB.bigC.shyD.young
小题9:
A.askB.leadC.wantD.allow
小题10:
A.flyB.raceC.swimD.sing
小题11:
A.asleepB.awayC.aroundD.awake
小题12:
A.ofB.throughC.overD.back
小题13:
A.skyB.heavenC.flightD.plane
小题14:
A.hisB.herC.theirD.its
小题15:
A.respectB.rememberC.followD.receive
小题16:
A.sadlyB.insteadC.hardlyD.too
小题17:
A.climbedB.lookedC.droveD.fell
小题18:
A.houseB.floorC.waterD.ground
小题19:
A.secretlyB.disappointedlyC.patientlyD.immediately
小题20:
A.looked awayB.set outC.went byD.turned back
题型:选择题

将两个物体放在水平桌面上,它们的重力之比是1:3,两个物体与水平桌面的接触面之比2:1,则两物体对桌面的压强之比是:[ ]

A.1:3

B.1:2

C.1:6

D.6:1

题型:选择题

要对某种药物或治疗方法的效果进行检验和评价,常采用

A.临床试验
B.现场试验
C.社区试验
D.动物实验
E.类实验

题型:选择题

要使某图层与其下面的图层合并可按什么快捷键?( )

A.Ctrl+K

B.Ctrl+D

C.Ctrl+E

D.Ctrl+J

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