You want to place a piece of glass tubing into a rubber stopper after the tubing has been fire polished and cooled. This is best done by A. lubricating the tubing with water or glycerin.

B. using a towel or cotton gloves for protection.

C. twisting the tubing and stopper carefully.

D. all of the above.

a

Explanation:

The history of Poland from 1945 to 1989 spans the period of communist rule imposed over Poland after the end of World War II.

c-reactive protein (crp) is an acute phase protein belonging to pentraxin family of proteins, whose levels increases 1000-fold or more in concentration in blood during the occurrence of an injury, inflammation or tissue death.