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【单选题】
现行规程规定，采用维卡仪测定水泥标准稠度用水量，以试杆距底板的距离为( )作为水泥净浆达到标准稠度的判定标准。A.
3mm±lmm
B.
4mm±1mm
C.
5mm±1mm
D.
6mm±1mm
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【单选题】女性, 50 岁。偶然发现左乳房有一包块,无痛,要求尽快明确肿块性质,应采取下列哪一项检查
A.
B 超
B.
红外线扫描
C.
肿块切除活检
D.
乳房钼靶摄片
E.
免疫学检查
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