60._________A. perfectlyB. extremelyC. veryD. cer

工作场所操作人员每天连续接触8小时噪声的限值是__________。A．85 dB B．85 dB（A) C．60 dB（A) D．60

1／2，1，4／3，19／12，__________。 A．133／60B．137／60C．107／60D．147／60

－－－ Could I have a bottle of water, please？－－－ ____________.A. Thank you very muchB. Cer

63._________A. Actually B. Correspondingly C. Cer

60._________A. dealingB. negotiatingC. havingD. a

60._________A. additionalB. specificC. especialD.