国家规定，烧结厂岗位粉尘合格标准和烟囱排放标准分别是小于10mg/m3和（）。
参考答案：150mg/m3
He raised a suggestion at the meeting, ____ well worth considering.
A．which I think is
B．which I think it is
C．I think is which
D．I think it is
确诊脓肿形成一可靠依据是（）
A.化脓
B.透视
C.触诊
D.穿刺
E.超声波检查
