用质数法确定代码结构中的校验位时，校验位的取值是质数法中的（）。
A.权
B.模
C.除得的商
D.除得的余数
参考答案：D
—It nearly took me two hours to walk here.
—Have a drink then. You be thirsty.[ ]
A. can't
B. must
C. mustn't
D. can
疱疹性咽峡炎的病原体为________；疱疹性口炎的病原体为_______。咽结膜热的病原体为_______，鹅口疮的病原体为_______。
