How can you tell when a sentence in a play is left incomplete?

What is crystallographic data processing and structure determination? what are the physical infrastructures of x-ray crystallographic structural biology? who can tell me detailed information? any would be appreciated. in advance!

Opium, methamphetamine, and cocaine are in the united states.

Anurse is teaching a client about nitroglycerin sublingual tablets. which of the following statements by the client indicates an understanding of the teaching? a. “this medication has a slower onset than a nitroglycerin pill that is swallowed.” b. “i should take this medication as soon as pain begins.” c. “i can crush this medication for faster relief.” d. “this medication should completely dissolve within 15 minutes.”