与违反传染病防治有关的罪名是（）
A.投毒
B.制造毒品
C.违反规定造成病菌、毒种扩散
D.生产劣药罪
E.非法携带毒品原植物幼苗罪
参考答案：C
根据课文内容填空。
David has a 1.b day on 2.T . He 3.g____ up at 6:30. He has 4.l at 5.a____
to twelve. After 6.___ , he goes to the 7. and cleans it carefully. At 4:15, he 8. to
watch a 9.f game. After supper, he should do10. 11. . He is 12.r___ _busy today.
回归热出现反复发作是因为（）
A.病原体反复入血
B.螺旋体长期潜伏在肝、肾、骨髓等器官定期释放毒素
C.患者反复被蜱叮咬
D.机体免疫反应和螺旋体体表抗原变异
E.患者反复被体虱叮咬
