焦炭的（）作用在高炉冶炼中最重要。

短文填空 根据短文内容及首字母提示，补全空格内单词，使短文完整通顺。

Mo Yan, the Chinese writer, won the 2012 Nobel Prize in literature on October 11,2012. The 57-year-old writer whose r__小题1:___name is Guan Moye, was born in 1955 and g___小题2:up in Shandong Province. Mo Yan is his pen name that means “Don’t s__小题3:___” in Chinese. Both of his parents were f___小题4:___. When he was twelve years old,he l ___小题5:___school to work, first on the farm and l__小题6:___in the factory. In 1976, he joined the army and b__小题7:___to study literature and write.

Most of his works are set in his o__小题8:___hometown, Gaomi County, Shandong in northeastern China. He is the f___小题9:__Chinese-language writer to win the award. Millions of Chinese people were e___小题10:____and proud of him after they heard this. His achievements push us students to do more reading.

“蓬生麻中，不扶自直；白沙在涅，与之俱黑。”从文化对人影响的角度看，下列说法体现的道理与这句话一致的是[ ]    

 ①孟母三迁 ②耳濡目染 ③东施效颦 ④近朱者赤，近墨者黑

A．①②③

B．①②④

C．①③④

D．②③④

短路电流非周期分量的起始值是超瞬变短路电流有效值的（）。

A．2倍

B．倍

C．/2倍

D．3倍

为保障飞行安全，建议无论是在白天还是夜间，当发动机在运转时就打开（）

A.防撞灯

B.着陆灯

C.航行灯

在直线上两个相距一寸的点A和B上各有一只青蛙，A点的青蛙沿直线跳往关于B点的对称点A₁，而B点的青蛙跳往关于A点的对称点B₁。然后A₁点的青蛙跳往关于B₁点的对称点A₂，B₁点的青蛙跳往关于A₁点的对称点B₂，如此下去，两只青蛙各跳了7次后，原来在A点的青蛙跳到的位置距离B点有多长距离（）

A．364寸

B．1088寸

C．1093寸

D．2187寸