夜间施工应确保哪些工作到位？
参考答案：
夜间施工确保施工负责人级别到位、防护到位、人员到位、机具到位、准备工作到位。
You _______ to the meeting this afternoon if you have something important to do.[ ]
A. needn't to come
B. don't need come
C. don't need coming
D. needn't come
做口腔护理时，对暂时不用的假牙应浸泡于
A．乙醇B．热水C．冷开水D．3%硼酸E．利凡诺溶液中
