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【简答题】
(本题满分12分)生物体死亡后,它机体内原有的碳14会按确定的规律衰减,大约每经过5730年衰减为原来的一半,这个时间称为“半衰期”. (Ⅰ)设生物体死亡时体内每克组织中的碳14的含量为1,根据上述规律,写出生物体内碳14的含量 与死亡年数 之间的函数关系式; (Ⅱ)湖南长沙马王堆汉墓女尸出土时碳14的残余量约占原始含量的76.7℅,试推算马王堆汉墓的年代.(精确到个位;辅助数据: )
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举一反三
【单选题】有一道语句如下: >>>x = 150 >>>y = 150 * 3 + 450 >>>z = 1000 >>>a = z - y >>>a 可以得到输出为何值?
A.
100
B.
0
C.
900
D.
语句语法错误
【单选题】When I appeared before you on a previous occasion, I had seen nothing of American art save the Doric columns and Corinthian chimney-pots visible on your Broadway and Fifth Avenue. I find that what you...
A.
public lecture
B.
public statement
C.
magazine article
D.
newspaper report
【单选题】Only ______ is true to this statement made in Paragraph 3: 'Art' when it is opposed to 'Science' is often romantic.
A.
art is often romantic when it is opposed to science
B.
art is often opposed to science when it is romantic
C.
art can often be romantic when we clearly define it
D.
science is often romantic when it is clearly defined
【单选题】灌注桩的缺点是( )
A.
单桩承载力小
B.
不能承受水平荷载
C.
挤土
D.
施工速度慢
【单选题】When I appeared before you on a previous occasion, I had seen nothing of American art save the Doric columns and Corinthian chimney-pots visible on your Broadway and Fifth Avenue. l find that what you...
A.
public lecture
B.
public statement
C.
magazine article
D.
newspaper report
【简答题】Poetry can be compared to painting. When you look at a work of art, you first see it for what it is—a depiction of a person, an animal, a place, or a thing. You 11 notice the colors and the textures, ...
【单选题】下列各句中,括号的成语使用不恰当的一项是( )
A.
中国古代文化的一座巍峨的高峰,不管我们在儒,释,道哪一条路上行走,殊途同归,最终必然会在山顶相逢。(殊途同归)
B.
京剧大师梅兰芳先生不仅在舞台上风姿绰约,在日常生活中也气度不凡,无论何时何地,他总能为之倾倒。(风姿绰约)
C.
春姑娘就是这么任性!令人哭笑不得,4月天让你过冬!近期天气可谓五风十雨,阴晴不定。昨天气温还高至26度。今日却骤降至12度。(五风十雨)
D.
按照新课改精神,教师应当以培养学生的综合能力为根本。当学生遇到疑难问题时,教师要善于启发引导。不要越俎代庖。(越俎代庖)
【单选题】If you want to see the art exhibition, when probably will you go?
A.
June 30.
B.
July 2.
C.
July25.
【单选题】下列各句中,括号中的成语使用恰当的一句是( )。
A.
规模相当大的百货商场人来人往,挤得(不可开交)。
B.
(巧夺天工)的大自然刺激了她的感官,也抚慰了她的心灵。
C.
他出狱后,仍不思悔改,和一个盗车犯(同心同德),半年之内偷了三辆车。
D.
他的作文想象丰富,表达流畅,老师十分赞赏,称他的文章如(天马行空),很有特点。
【单选题】—__________do you have the Art Festival? —In  June. [     ]
A.
How
B.
When
C.
What
D.
when's
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