根据《污水综合排放标准》,总汞的最高允许排放浓度限值是()mg/L
A.0.005
B.0.05
C.0.1
D.0.5
参考答案:B
在裸露的骨皮质或肌腱上植皮,面积超过多少即可影响皮片成活()
A.0.5cm
B.1cm
C.1.5cm
D.2cm
E.3cm
(2014·枣庄模拟)The teacher simplified the instructions________the children could understand better.
A.so that
B.unless
C.in case
D.though