在光照条件下，将1molCH₄与1molCl₂混合后，经充分时间的光照，得到的液态产物为（　　）

A．CH₂Cl₂、CHCl₃、CCl₄

B．CCl₄

C．CH₃Cl、CH₂Cl₂、CHCl₃、CCl₄

D．CH₃Cl

The nurse plans to administer an injection of heparin to a client. Which of the following techniques for heparin administration is appropriate

A．Selects a 1.5-inch, 21-gauge needle for the injection.

B．Makes the injection into the deltoid muscle.

C．Applies gentle pressure to the site for 5 to 10 seconds after the injection.

D．Aspirates with the plunger to check for entry into the blood vessel before injecting the heparin.