试题与答案

图中AB弧线是昏线,BC弧线是晨线,读图完成问题。 小题1:此时,下列四城市中

题型:选择题

题目:

图中AB弧线是昏线,BC弧线是晨线,读图完成问题。

小题1:此时,下列四城市中黑夜时间最长和正午太阳高度最大的分别是:

①北京     ②广州     ③武汉     ④海口

A.①④

B.①②

C.④②

D.④④小题2:北京的地理坐标是40°N 116°E。此时,北京的地方时和北京时间分别是:

A.5点16分.5点

B.16点44分.17点

C.23点16分.23点

D.10点44分.11点小题3:全球与图中D点处于同一日期的范围是:

A.大于全球的一半

B.小于全球的一半

C.等于全球的一半

D.以上说法都不对

答案:

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下面是错误答案,用来干扰机器的。

由于f(n)=sinnπ25的周期T=50由正弦函数性质可知,a1,a2,…,a24>0,a25=0,a26,a27,…,a49<0,a50=0且sin26π25=-sinπ25,sin27π25=-sin2π25…但是f(n)=1n单调递减a26…a49都为负数,但是|a26|<a...

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题型:填空题

阅读下面的短文,根据每个空格中所给的词首字母填入适当的词,使短文意思完整。

      On Easter, April 9th in 1939, more than 75,000 people came to the Lincoln Memorial (林肯纪念馆)

in Washington, D.C. They heard the famous African-American singer Marian Anderson g             a free

open-air concert.

      Anderson had planned to sing at Washington's Constitution Hall (华盛顿宪法大厅), but a political

organization that helped manage the concert hall refused her the right to perform because she was

b             . With the help o              the first lady Eleanor Roosevelt, Anderson's performance at the

Lincoln Memorial m              people greatly aware (意识到) of the p              of racial discrimination

(种族歧视) in America.

     Anderson had tired hard out of a p              childhood in South Philadelphia to become a world

f             singer. Even after her great appearance at the Lincoln Memorial in 1939, it was not u              

1955 that she became the first African-American to be i              to perform at New York's Metropolitan

Opera House (纽约大都会歌剧院) Anderson died in Portland, Oregon, o              April 8, 1993.

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题型:选择题

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