【单选题】对于单模光纤来说,主要是( )色散引起光脉冲的展宽。
【简答题】In this section, there is a passage with 10 blanks. You are required to select one word for each blank from a list of choices given in the word bank following the passage. Read the passage through car...
【判断题】19世纪黑格尔提出艺术三大类型(现实型、古典型、浪漫型)、五大门类(建筑、雕塑、绘画、音乐、诗歌)。
【简答题】“... I was conscious of his superiority in a way which was embarrassing and led to trouble” Try to explain the meaning of this sentence.
【简答题】如图,已知反比例函数 y= k x 与一次函数y=x+b的图象在第一象限相交于点A(1,-k+4).解答下列问题: (1)求A点的坐标; (2)求这两个函数的解析式.
【单选题】I do not doubt the (superiority) of the new method over the old one.
【简答题】选词填空(用所给单词前的序号填空) A. initially B. unemotional C. bemoan D. masculine E. staple F. presume G. singular H. ...
【简答题】已知y与2x+1成正比例,且x=-1时,y=2,解答下列问题: (1)求y与x的函数解析式; (2)当y=10时,求x的值.
【简答题】已知二次函数y=3x 2 -6x-24解答下列问题: (1)将这个二次函数化为y=a(x+h) 2 +k的形式. (2)写出这个二次函数的图象与坐标轴的交点坐标. (3)画出该二次函数的大致图象. (4)当x取何值时,y>0?