问题 选择题

如图表示骨中某类物质在各年龄阶段含量的变化情况,下列叙述中,不正确的是(   )

A.骨煅烧后剩下的灰白成分就是该类物质

B.骨在盐酸中浸泡时,该类物质不被溶解

C.在b年龄段,骨既坚固又有弹性

D.在c年龄段,骨受到外力冲击,易发生骨折

答案

答案:B

题目分析:骨的主要成分可分为有机物和无机物,两者的成分在不同的年龄段所含比例不尽相同,从出生到青年七中有机物多于无机物所以小孩的骨骼相对较软容易变形,所以老师要求初中学生要坐正,以免引起弯腰驼背,而从青年到老年,两者比例几乎相等,此时是骨的最佳时期,而老年之后有机物会消退,无机物比例较有优势,骨骼变得相对脆,所以老人怕摔。而骨中无机物主要是钙,钙容易溶解于盐酸。分析坐标我们可以看出随着abc年龄的增长比例不断上升我们判定这类物质是无机物---钙。所以选B错误。

单项选择题
单项选择题

That low moaning sound in the background just might be the Founding Fathers protesting from beyond the grave. They have been doing it when George Bush, at a breakfast of religious leaders, scorched the Democrats for failing to mention God in their platform and declaimed that a President needs to believe in the Almighty. What about the constitutional ban on "religious test(s)" for public office the Founding Fathers would want to know. What about Tom Jefferson’s conviction that it is possible for a nonbeliever to be a moral person, "find (ing) incitements to virtue in the comfort and pleasantness you feel in its exercise" Even George Washington must shudder in his sleep to hear the constant emphasis on "Judeo- Christian values." It was he who wrote, "We have abundant reason to rejoice that in this Land ... every person may here worship God according to the dictates of his own heart."

George Bush should know better than to encourage the theocratic ambitions of the Christian right. The "wall of separation" the Founding Fathers built between church and state is one of the best defenses freedom has ever had. Or have we already forgotten why the Founding Fathers put it up They had seen enough religious intolerance in the colonies: Quaker women were burned at the stake in Puritan Massachusetts; Virginians could be jailed for denying the Bible’s authority. No wonder John Adams once described the Judeo-Christian tradition as "the most bloody religion that ever existed," and that the Founding Fathers took such pains to keep the hand that holds the musket separate from the one that carries the cross.

There was another reason for the separation of church and state, which no amount of pious ranting can expunge: not all the Founding Fathers believed in the same God, or in any God at all. Jefferson was a renowned doubter, urging his nephew to "question with boldness even the existence of a God." John Adams was at least a skeptic, as were of course the revolutionary firebrands Tom Paine and Ethan Allen. Naturally, they designed a republic in which they themselves would have a place.

Yet another reason argues for the separation of church and state. If the Founding Fathers had one overarching aim, it was to limit the power not of the churches but of the state. They were deeply concerned, as Adams wrote, that "government shall be considered as having in it nothing more mysterious or divine than other arts or sciences.’ Surely the Republicans, committed as they are to "limited government," ought to honor the secular spirit that has limited our government from the moment of its birth.

The separation of religion and state was designed mainly to()

A. highlight the role of the government

B. pay tribute to religious leaders

C. limit the command of the government

D. encourage the believers’ ambitions