A.are originally found in continental climates
B.are the only life forms in Tibet, which is as big as a continent
C.have been found in other parts of the Asian continent
D.are found in land mass that used to be a separate continent
第10题
氯霉素的主要不良反应是
A.骨髓抑制
B.二重感染
C.胃肠道反应
D.耳毒性
E.影响骨、牙生长
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