小李的父亲经常咳嗽，午后低热，晚上出冷汗，咳时痰中带有血丝，医生为其检查后确诊为肺结核，马上住院治疗，并及时给小李接种了卡介苗，小李的姐姐刚好出差没有接种卡介苗。住院期间，姐弟俩轮流照顾护理父亲。后来小李和姐姐在医院进行体检，发现姐姐感染上了肺结核。

Ⅰ．某烃A的质谱图表明其相对分子质量为84，红外光谱表明分子中含有碳碳双键，核磁共振谱表明分子中只有一种类型的氢．

用适当的词补全对话。

A: Do you know we have a new teacher and two new students this semester?

B: Really? What ____ the new teacher look ____?

A: He is an old man. He ____ no hair.

B: Is he ____?

A: Yes. And he ____ glasses.

B: ____ he have a mustache?

A: No, he ____ a beard. He is not good-looking. But he is very kind.

B: What ____ your new classmates? What ____ they ____ like?

A: They are twins. They look the ____. They ____ of medium height. They're not heavy ____ thin. They ____ curly hair.

B: What's the ____ ____ their hair?

A: Well, they ____ blonde hair. They are good-looking.

一质量m=0.5kg的滑块以一定的初速度冲上一倾角为30°足够长的斜面，某同学利用DIS实验系统测出了滑块冲上斜面过程中多个时刻的瞬时速度，如图所示为通过计算机绘制出的滑块上滑过程的v﹣t图象．求：（g取10m/s²）

若双曲线与椭圆$\frac{x^2}{16}+\frac{y^2}{25}=1$有相同的焦点，与双曲线$\frac{x^2}{2}-y^2=1$有相同渐近线，求双曲线方程．