We reached the station late, and ___________ missed the train.

Kind : ___________ : : Often : Frequently

(By word meaning)

A survey for a certain year found that 90% of pregnant women received medical care at least once before giving birth. Of these women, 60% received medical care from doctors, while 40% received medical care from other healthcare providers.

Given this information, which one of the following statements can be inferred with certainty?

Looking at the surface of a smooth 3-dimensional object from the outside, which one of the following options is TRUE?