VHFDSC设备中,码元空号对应的频率是:()
A.1615HZ
B.1785HZ
C.2100HZ
D.1300HZ
参考答案:C
下列句中各有一处错误,指出并改正。
1. He lives nearest to the school,so he has the short journey.
2. Betty is friendly with us.
3. He is born in Shanghai in 1998.
4. Do you see the chair have three legs?
某大厦工程,钢筋混凝土框架结构,地上10层,地下1层,建筑面积45000m2,基础为钢筋混凝土筏板基础。工程施工场地位于市内繁华地段。为加快施工进度,该工地未按当地规定的时间停工,噪声严重影响居民。其违规作业受到周边居民的投诉,而后被有关部门对其进行了处罚。
下列有关白天进行打桩施工时噪声的分贝,符合标准的是( )dB。
A.65
B.105
C.85
D.95
E.75