Jobs are hard to get and, _______, more young people are continuing their education.

A．above all

B．as a result

C．on the contrary

D．after all

下列哪些污染物易在体内蓄积（）。

A.SO₂、NOX、苯并芘

B.DDT、Hg、Cd

C.CO、酚、甲醛

D.甲醛、氡、氨

E.有机磷、有机氯、有机酸