如图，$F_1,F_2$是双曲线$C_1$：$x^2-\frac{y^2}{3}=1$与椭圆$C_2$的公共焦点，点A是$C_1{C}_2$在第一象限的公共点．若$\left|F_1{F}_2\right|=\left|F_{1}A\right|$，则$C_2$的离心率是(      )

⑴Do you like pears?____             A. I can see twelve.

⑵Where are you from?____          B. No, I don't.

⑶How many cars can you see?____   C. He's my father.

⑷Is it on your desk?____             D. I'm from Canada.

⑸Who is that man?____              E. Yes, it is.

词汇检测

化学实验里，老师给学生准备了如图几种实验装置．