( )向海域排放低水平放射性废水；确需排放的，必须严格执行国家辐射防护规定。
A．禁止 B．严格限制 C．限制 D．严禁
参考答案：B
—Have you told Joan the bad news that her grandfather fell off the bike and hurt seriously?
—Yes. I told her ________I saw her this afternoon.[ ]
A. while
B. the moment
C. until
D. suddenly
硬脑膜动静脉瘘最主要的临床表现是（）
A.头痛
B.蛛网膜下腔出血
C.癫痫
D.血管杂音
E.神经功能缺失
