选择正确的读音。
鼓(gǔ kǔ) ____滑(huá há)____ 卜(bō mō)____
你能告诉我4.20万精确到什么位吗?( )
①玻璃球的折射率及光线第一次从玻璃球内出射时相对于射入玻璃球的光线的偏向角;
②光线从A点进入及第一次A点射出时在玻璃球体中传播的时间.
阅读短文,回答问题。
Seeing the Doctor
Mum: What is the matter, my son?
Son: My head is hurting. I can't go to school.
Mum: Come with me to the doctor.
Son: The doctor! Oh, no! My head is not hurting. I can go to the school.