工具栏中的Restrict to X按钮被按下以后,在视窗中物体将沿哪一个轴移动()

题型:单项选择题

问题:

工具栏中的Restrict to X按钮被按下以后,在视窗中物体将沿哪一个轴移动()。

A.XY

B.Z

C.Y

D.X

考点:计算机科学技术三维动画三维动画题库
题型:单项选择题

据有关资料介绍:将贝壳(主要成分是碳酸钙)灼烧后与草木灰(主要成分是碳酸钾)在水中作用,可以得到氢氧化钾。某化学课外小组的同学们为了制取氢氧化钾,将少量碳酸钙充分灼烧后的固体放入烧杯中,再向其中加入一定量10%的碳酸钾溶液,充分反应冷却后过滤、洗涤得到固体A和溶液B,操作步骤如图所示。请你与小组同学共同完成以下探究:

【提出问题1】固体A中的成分是什么?

【猜想与假设】甲同学:只有CaCO3;乙同学:CaCO3、Ca(OH)2

【实验与探究】甲、乙同学为了验证各自的猜想,见下表。

【反思与评价】小组同学讨论后认为,甲同学的实验不能证明他的猜想,理由是(2)_________________;而乙同学的实验能证明他的猜想,因此小组同学确定了固体A的成分。

【提出问题2】溶液B中溶质的成分是什么?

【猜想与假设】丙同学:KOH、K2CO3;丁同学:KOH、Ca(OH)2

【表达与交流】结合对固体成分的探究,同学们经过讨论确定了(3)_______同学猜想正确,理由是(4)_______________。为了得到纯净的氢氧化钾,需要向溶液B中滴加适量的一种溶液,发生反应的化学方程式为(5)_________________,小组同学通过相应的实验操作最终制得了氢氧化钾。

题型:单项选择题

生产力范畴反映的是()。

A.人与自然之间的关系

B.人与社会之间的关系

C.人与劳动产品的关系

D. 劳动者与剥削者的关系

题型:单项选择题
“Dash” is a symbol which represents every day we’re spreading alive on earth. Therefore, how you spend your “dash” is important.
Recently I  1  about a little girl named Hope. After learning more about her life, I couldn’t help but feel it was not by 2 ,nor happenstance, that she had been named “Hope”. The strong feeling of sympathy and generosity 3 in her young heart made a lasting impression on me and countless others. 4  I never had the opportunity to meet her, I wish I had. It seems as though she was beyond her tender years and very, very special. Hope was a twelve-year-old girl who was 5 a “wish” in early December 2010 by the “Make-A-Wish” Foundation after being 6  that she had a rare type of bone cancer. However, when she found out that more than 150 7 in her area like her were waiting for their wishes to be granted, she unselfishly used her wish to 8 that those children have their wishes granted. She also hoped that it could be done 9  January 16, 2011.Unfortunately, however, the organization told her that her 10  request couldn’t be granted as the funds were simply 11  . They calculated that they would need to raise more that one 12  dollars in thirty days in order to grant her wish. 13 , but not discouraged, she turned her disappointment into an enthusiasm that inspired warm-hearted 14 to take up helping grant the wishes of the other children, and eventually 15  as well. Newspaper columnists and reporters for radio and TV stations 16  the story of this 17  young girl who had touched the hearts of so many and as word spread, the community was challenged. Committees were fanned and schools, corporations and various organizations assisted in 18 money to help make Hope's dream come true.
Her efforts were not in vain as they continued to help others, not only 19 , but spiritually and emotionally as well. At the gathering to celebrate her life, “A Celebration of Hope” on January 16,2011, the 20  was made that they had indeed received donations totaling more than one million dollars. Her wish had been granted!
小题1:
A.heardB.thoughtC.caredD.talked
小题2:
A.coincidenceB.independenceC.convenienceD.intelligence
小题3:
A.lostB.carriedC.expectedD.housed
小题4:
A.UntilB.UnlessC.ThoughD.If
小题5:
A.expressedB.offeredC.madeD.sent
小题6:
A.recognizedB.informedC.remindedD.understood
小题7:
A.childrenB.citizensC.villagersD.relatives
小题8:
A.tellB.askC.arrangeD.order
小题9:
A.forB.toC.onD.by
小题10:
A.finalB.formalC.simpleD.noble
小题11:
A.unbearableB.unbelievableC.unavailableD.uncomfortable
小题12:
A.thousandB.hundredC.millionD.billion
小题13:
A.DisappointedB.SurprisedC.worriedD.Embarrassed
小题14:
A.committees B.individualsC.corporationsD.organizations
小题15:
A.theirsB.oursC.hersD.yours
小题16:
A.wroteB.readC.broadcastD.shared
小题17:
A.caringB.tiringC.annoyingD.worrying
小题18:
A.findingB.spendingC.raisingD.borrowing
小题19:
A.perfectlyB.physicallyC.healthilyD.thankfully
小题20:
A.proposalB.decisionC.conclusionD.announcement
题型:单项选择题

乳糖胆盐培养基高压灭菌的温度和时间是()。

A.115℃,20min

B.121℃,15min

C.115℃,10min

D.115℃,15min

E.121℃,20min

题型:单项选择题

缺件订购流程的目的不包括()

A.保证日常库存供应充足

B.在车辆维修前,确定需要但又无库存的零部件,可以及时订货或多渠道调配,保证维修顺利进行

C.满足紧急维修车辆的要求

D.提高服务营销的效率

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