撤销认证的企业( )后可重新提出认证申请。
A．3个月 B．6个月 C．1年 D．3年
参考答案：C
连词成句。
1. What, hobby, is, your
2. English, She, reading, likes
3. pal, in, a, have, Xi'an, I, pen
4. often, I, foot, on, to, school, go
5. The, goldfish, swim, can, It, red, is
6. watch, John, TV, evening, every, Does
对比剂反应分为哪几类？各有何主要临床反应？
