Which of the following is NOT true about Sasser and Netsky
A. They were created by Jaschan.
B. They are Jaschan's friends.
C. They are computer viruses.
D. They threaten computer security.
查看答案
The value of dolphins in military uses is inspired by______.
A. their buzzes
B. their quacks
C. their clicks
D. their squeals
Elle a un peu de _____ avant son examen.
A. peur
B. crainte
C. fierté
D. appréhension
微机上广泛使用的Windows是______。
A. 多任务操作系统
B. 单任务操作系统
C. 实时操作系统
D. 批处理操作系统
关于贲门失弛缓症的临床特点，哪一项是正确的（）
A. 最早症状多为反胃和呕吐
B. 多起病于青春期
C. 男性多于女性
D. 占食管良性疾病的第二位，仅次于平滑肌瘤
E. 在早期阶段，滞留食物刺激迷走神经可产生胸痛
微信支付 
支付宝支付