Which kind of route of drug admininstration is the most improtant method of administrating drugs for systemic effects?

中国大学MOOC: 3.Body language plays an improtant role in job interview communication,so,it is very important to ________and use it correctly

Put the following into Chinese. "It is improtant never to lose sight of the fact that accounting is concerned with providing economic information to users. Accounting is, therefore, a form of service."