下图甲为有丝分裂过程中细胞内核DNA含量变化曲线图,乙为有丝分裂各时期图像(顺序已打

题型:填空题 案例分析题

问题:

下图甲为有丝分裂过程中细胞内核DNA含量变化曲线图,乙为有丝分裂各时期图像(顺序已打乱),请回答:

 

研究染色体数目和形态最好的是乙图中的()时期,此时细胞内染色体、DNA、染色单体之比为()

考点:高中生物细胞增殖细胞增殖题库
题型:填空题 案例分析题
有一块地,面积是1公顷,它的长是200米,宽是(  )
A.200米B.100米C.50米D.5米
题型:填空题 案例分析题
完形填空(共20小题;每小题1.5分,满分30分)
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。
The True Story of Treasure Island
It was always thought that Treasure Island was the product of Robert Louis Stevenson’s imagination.  ___36___,recent research has found the true story of this exciting work.
Stevenson, a Scotsman, had lived    37   for many years in 1881 he returned to Scotland for a    38   . With him were his American wife Fanny and his son    39    .
Each morning Stevenson would take them out for a long    40   over the hills. They had been   41   this for several days before the weather suddenly took a turn for the worse, Kept indoors by the heavy rain. Lloyd felt the days   42   . To keep the boy happy Robert asked the boy to do some   43  .
One morning, the boy came to Robert with a beautiful map of an island. Robert   44  that the boy had drawn a large cross in the middle of   45  . “What’s that?” he asked “That’s the    46  treasure “said the boy Robert suddenly   47  something of an adventure story in the boy’s   48  While the rain was pouring, Robert sat down by the fire to write a story. He would make the   49   a twelve-year-old boy just like Lloyd.  But who would he the pirate(海盗)?
Robert had a good friend named Henley, who walked around with the   50  of a wooden leg. Robert had always wanted to   51  such a man in a story  52  Long John Silver the pirate with a wooden leg, was   53  .
So thanks to a    54   .September in Scotland a friend with a wooden leg and the imagination of a twelve-year-old boy we have one of the greatest   55  stories in the English language.
小题1:
A.HoweverB.ThereforeC.BesidesD.Finally
小题2:
A.aloneB.next doorC.at homeD.abroad
小题3:
A.meetingB.storyC.holidayD.jib
小题4:
A.LloydB.RobertC.HenleyD.John
小题5:
A.talkB.restC.walkD.game
小题6:
A.attemptingB.missingC.planningD.enjoying
小题7:
A.quietB.dullC.busyD.cold
小题8:
A.cleaningB.writingC.drawingD.exercising
小题9:
A.doubtedB.noticedC.decidedD.recognized
小题10:
A.the seaB.the houseC.ScotlandD.the island
小题11:
A.forgottenB.buriedC.discoveredD.unexpected
小题12:
A.sawB.drewC.madeD.learned
小题13:
A.bookB.replyC.pictureD.mind
小题14:
A.starB.heroC.writerD.child
小题15:
A.helpB.problemC.useD.bottom
小题16:
A.praiseB.produceC.includeD.accept
小题17:
A.YetB.AlsoC.ButD.Thus
小题18:
A.readB.bornC.hiredD.written
小题19:
A.rainyB.sunnyC.coolD.windy
小题20:
A.newsB.loveC.real-lifeD.adventure
题型:填空题 案例分析题

某工厂女工,这几天处于月经期,应避免安排何种作业()

A.露天作业

B.高温作业

C.冷库内低温作业

D.加班作业

E.轮班作业

题型:填空题 案例分析题

储量估算图检查出图纸不符合要求的1项扣()分。

A.1

B.2

C.3

题型:填空题 案例分析题

不论是正等测还是斜等测都是根据简化了的轴向缩短率1:2绘制。

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