韦达是()的数学家。A、德国B、法国C、英国D、意大利

题型:单项选择题

问题:

韦达是()的数学家。

A、德国

B、法国

C、英国

D、意大利

考点:历史学科学技术发展简史科学技术发展简史题库
题型:单项选择题

交换机是靠定时器来实现监视和话路强迫释放,其中摘机久不拨号等待时长为()。

A.10秒

B.20秒

C.60秒

D.90秒

题型:单项选择题

下列心律失常在风湿性二尖瓣狭窄中常见的是()。

A.室上性心动过速

B.房室传导阻滞

C.房性早搏

D.心房颤动

E.室性期前收缩

题型:单项选择题

1877年上海开始出现的通讯手段是[ ]

A.有线电报

B.有线电话

C.无线电报

D.无线电话

题型:单项选择题
Once in Japan there lived two frogs, one of whom made his home near the town of Osaka, while the other lived in Kyoto.  36 , they didn’t know each other. Bothof them liked to see a little of the world: the Kyoto frog wanted to visit Osaka, and the Osaka frog wished to go to Kyoto.
So one morning they  37. However, the journey was more  38  than they had expected, for they didn’t know much about traveling. Half-way between the two towns, at the top of a mountain, the two frogs  39  each other! Soon they fell into  40 .
“What a(n)  41  we are too small, ” said the Osaka frog. “Otherwise, we could see both towns from here, and  42  if it is worth our going on.”
“Oh, that is easily  43 ,” replied the Kyoto frog. “We have only got to stand up on our hind (后面的) legs, and hold on to each other  44  we won’t fall down, and then we can both look at the towns we are  45  to.”
This idea  46  the Osaka frog; he stood up and put his front paws on the  47 of the other frog, who had risen also. There they both stood, stretching themselves as  48  as they could. The Kyoto frog turned his nose towards Osaka, and the Osaka frog, towards Kyoto, but the  49  frogs forgot that when they stood up, their eyes were in the backs of their heads, and that  50  their noses pointed to their destinations, yet their eyes looked at the places  51  which they had come.
“Dear me!” cried the Osaka frog. “Kyoto is  52  like Osaka. It is certainly not worth such a long journey.”
“If I had known that Osaka was only a  53  of Kyoto I should never have traveled all this way,”  54  the frog from Kyoto. Then they started off for their  55  again.
小题1:
A.Surprisingly B.HoweverC.FortunatelyD.Undoubtedly
小题2:
A.showed offB.left outC.turned awayD.set out
小题3:
A.wonderfulB.dangerousC.exhaustingD.exciting
小题4:
A.endangeredB.encouragedC.encounteredD.embarrassed
小题5:
A.conversationB.disagreementC.competitionD.consideration
小题6:
A.shame B.surpriseC.shortcomingD.coincidence
小题7:
A.doubtB.wonderC.show D.tell
小题8:
A.finishedB.managedC.imaginedD.prepared
小题9:
A.as long asB.in caseC.so thatD.unless
小题10:
A.turning B.traveling C.settlingD.adapting
小题11:
A.worriedB.disturbedC.confusedD.pleased
小题12:
A.legsB.shouldersC.headD.nose
小题13:
A.highB.wideC.farD.quickly
小题14:
A.adventurous B.closeC.smartD.foolish
小题15:
A.because B.thoughC.sinceD.if
小题16:
A.fromB.toC.aroundD.in
小题17:
A.hardlyB.partlyC.mostlyD.exactly
小题18:
A.corner B.partC.copyD.spot
小题19:
A.exclaimedB.announcedC.hesitatedD.thought
小题20:
A.destinationsB.dreamsC.homesD.countries
题型:单项选择题

消防员灭火防护服阻燃性能:续燃时间不大于()s,损毁长度不大于100mm,且无熔融,滴落现象。

A.2.0

B.3.0

C.4.0

D.5.0

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