第17题: [单项选择]According to the passage, Lyme disease ______. A. is one of the contagious diseases B. is spread by a kind of tiny bugs C. causes infection all over the body D. develops against any painkillers 参考答案:B 答案解析:文中提到莱姆病是a tick-borne infection即是一种扁虱携带的感染病。所以正确答案是B(由一种小虫子传播)。