化学防腐剂包括能抑制微生物生长繁殖的（）和杀菌剂两类。
参考答案：抑菌剂
—Tom does well in all his subjects, but he never shows off.
—I agree, He is very .
A．modest
B．clever
C．easy-going
D．generous
胃癌可腹腔种植于腹膜、大网膜。()
