He asked me ___________ Zhang Hua came to school or not. 

— What would you like to have, meat or fish?

— _____________________.

— I would like to make an appointment for the meeting. Which day would you prefer, Tuesday or Thursday?

— _________________ 

It's ___________ to point to or talk about strangers in public.

— ___________________

— Once or twice a week.

— Which city has _________population, Beijing, Guiyang or Nanchang?

— Beijing, of course.

如图，根据二尖瓣M型超声心动图特征，可见CD段呈_______样改变。

如图，二维超声心动图中，此为____________切面。