急性白血病发病病因不包括 ()
A.病毒感染
B.细菌感染
C.化学物质长期接触
D.细胞毒性药物
E.电力辐射
参考答案:B
If you are in the zoo, remember not to touch or go near the animals. Although some of the animals are cute, you _________ leave them alone.
A.must
B.will
C.may
D.can
有一病人颈部能触及一肿块,可能患什么病,病史及检查注意什么