病原体侵人人体后,临床上不显示出任何症状、体征,但可产生特异性免疫,被称为()。
A.潜伏性感染
B.病原体被清除
C.隐性感染
D.显性感染
E.病原携带状态
参考答案:C
At the age of 29, Dave was a worker,______in a small apartment near Boston and _______what to do about his future.
A.living;wondering
B.lived;wondering
C.lived;wondered
D.living;wondered
票汇的特点包括()。
A.有流通的便利
B.不需通知收款人取款
C.交款迅速
D.可以透支资金
E.免收手续费