克雅病与下列哪种病原体有关（）
A.朊粒
B.类病毒
C.卫星病毒
D.噬菌体
E.病毒
参考答案：A
如果a＞0，b＜0，那么-a+b______0（选填“＞”、“=”、“＜”）．
__________ in the traffic jam, he was likely to be late for the job interview.
A．Being stuck
B．Having stuck
C．Stuck
D．Got stuck
