未取得______的，不得开展产品质量检验工作。
A．合法证书 B．计量认证合格证书C．产品合格证书 D．计量合格证书
参考答案：B
The representatives were discussing the 11th fiveyear plan that they would like to see ______ the
next year.[ ]
A. carry out
B. carrying out
C. carried out
D. to carry out
有关痈处理方法错误的是（）
A.中央部坏死组织多，全身症状重者，应手术治疗
B.切口应超出炎症范围
C.切开至皮肤全层
D.尽量剪除坏死组织
E.唇痈不宜切开
