听短文,判断正(T)误(F)。 ( )1. David Brown is from England. ( )2. He is 13 years old. ( )3. David is in Class 2,Grade Seven. ( )4. Mr Liang is David's English teacher. ( )5. David can speak a little Chinese.
【简答题】按照《建筑施工场界环境噪声排放标准》,建筑施工场界环境噪声排放限值为( )。 A. 昼间 60dB ( A ),夜间 50dB ( A ) B. 昼间 65dB ( A ),夜间 50dB ( A ) C. 昼间 70dB ( A ),夜间 55dB ( A ) D. 昼间 75dB ( A ),夜间 60dB ( A )