检验混凝土防水剂时,混凝土坍落度可以选择。()
A、(80土10)mm
B、(100土10)mm
C、(200土10)mm
D、(180土10)mm
参考答案:A, D
开胸手术适用于()
A.手足多汗症
B.肺癌伴胸椎、肝脏转移
C.肾上腺肿瘤双肺多发转移
D.中央型肺癌
E.纵隔淋巴肉瘤
One advantage of the all-purpose nozzle is that it().
A.can fit any size hose
B.converts a stream of water into a fog
C.increases the amount of water reaching the fire
D.can spray two streams of water at the same time