关于红外线叙述哪二项是错误的() A.红外线是太阳辐射波长最长的一种电磁波 B.红外

题型:单项选择题 A1型题

问题:

关于红外线叙述哪二项是错误的()

A.红外线是太阳辐射波长最长的一种电磁波

B.红外线主要生物学作用是使机体产生热效应

C.红外线可促进新陈代谢,有消炎、镇痛作用

D.红外线为可见的红光

E.过量的红外线照射可引起皮肤烧伤、白内障及中暑

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题型:单项选择题 A1型题

若等比数列{an}满足an•an+1=9n,则公比q=______.

题型:单项选择题 A1型题
Like most people, I was brought up to look upon life as a process of getting. It was not until in my late thirties that I made this important     : giving-away makes life so much more exciting. You needn’t worry if you       money.
This is how I     with giving-away. If an idea for improving the window display of a neighborhood store     in my mind, I step in and make the     to the storekeeper. If an accident takes place, the     of which I think the local police could use, I     him up and tell him about it, though I am not in    here. I found a rule about this world is to give     getting something back, though the    often comes in an unexpected form.
One Sunday morning the local post office delivered an important special letter to my home, though it was     to me at my office. I wrote the postmaster a note of     . More than a year later I needed a post-office box for a new business I was     . I was told at the window that there were     boxes left, and that my name would have to go on a long     list. As I was about to be      , the postmaster appeared in the    . “Wasn’t it you that wrote us that letter a year ago about delivering an      delivery to your home?” I said it was. “Well, you certainly are going to have a box in this post office     we make one specifically for you. You don’t know what a letter like that means to us. We usually get     but complaints.”
小题1:
A.differenceB.researchC.speechD.discovery
小题2:
A.earnB.lack C.spendD.steal
小题3:
A.experiencedB.connectedC.cooperatedD.experimented
小题4:
A.strikes B.flashesC.happensD.attempts
小题5:
A.appealB.requestC.suggestionD.demand
小题6:
A.storyB.damageC.challengeD.material
小题7:
A.callB.hold C.cheerD.pick
小题8:
A.possessionB.troubleC.placeD.charge
小题9:
A.plusB.withoutC.forD.before
小题10:
A.processB.goal C.return D.concern
小题11:
A.repliedB.addressedC.drivenD.brought
小题12:
A.invitation B.apologyC.complaintD.appreciation
小题13:
A.discussingB.providingC.applying D.starting
小题14:
A.enough B.extraC.noD.other
小题15:
A.admittingB.relating C.buyingD.waiting
小题16:
A.positiveB.shockedC.discouragedD.optimistic
小题17:
A.doorwayB.windowC.home D.yard
小题18:
A.unfamiliarB.unexpectedC.unknownD.uncertain
小题19:
A.in caseB.now that C.even ifD.rather
小题20:
A.nothingB.somethingC.anything D.everything
题型:单项选择题 A1型题

一个小球做自由落体运动,在第1s内重力做功为W1,在第2s内重力做功为W2;在第1s末重力的瞬时功率为P1,在第2s末重力的瞬时功率做功为P2,则W1:W2及P1:P2分别等于(  )

A.1:1,1:1

B.1:2,1:3

C.1:3;1:2

D.1:4,1:2

题型:单项选择题 A1型题

输卵管妊娠的原因不包括 ()

A.输卵管周围肿瘤

B.输卵管黏膜纤毛缺乏

C.放置宫内节育器

D.子宫畸形

E.受精卵游走

题型:单项选择题 A1型题

孙某(男,1983年7月4日出生)于 1997年6月30日、7月1日、7月2日连续三次盗窃财物,价值3万元;于1999年7月2日、7月3日连续二次盗窃财物,价值2万余元;于2000年1月1日又盗窃财物,价值1万元。案发后,孙某被捕归案。法院认定孙某的行为构成盗窃罪,其盗窃数额为:

A.6万元

B.5万元

C.4万元

D.1万元

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