一个数的千位上是8,个位上是3,其他位上是0,这个数写作( ),读作( )。
8003,八千零三
The earthquake which happened in YuShu _____ 14th April 2010 was a big disaster. [ ]
A. at
B. on
C. in
D. to
与钩体病的类型和严重程度无关的因素是()
A.机体的抵抗力
B.发病者的年龄和性别
C.钩体的数量
D.钩体的毒力
E.钩体的种类