噪声预测主要有两个方面的内容（）和环境噪声预测。
参考答案：交通噪声预测
.---Where’s that report?
---I brought it to you ________ you were in Mr. Black’s office yesterday.
A．if
B．when
C．because
D．before
下述剂量所对应的给药方法是：0.2ml以下（）.
A．静脉滴注
B．椎管注射
C．肌内注射
D．皮下注射
E．皮内注射
