Jenny goes to work five ____________ a week.[ ]
A. time
B. times
答案：B
关于膀胱尿路上皮原位癌，正确的是（）
A.不属于上皮瘤变
B.瘤细胞异型增生，浸润到黏膜下层
C.绝大多数发生于浸润性尿路上皮癌周围
D.发病与病毒感染相关
E.以上各项都正确
You should plot your dead reckoning position at（）.
A.every fix or running fix
B.every course change
C.every speed change
D.All of the above are correct
