常见的生物膜工艺有( )。 ①生物滤池 ②生物转盘 ③生物接触氧化④生物流化床
A.①②③
B.①③④
C.①②③④
D.②③④
参考答案:C
The Shanghai World Expo came to an end on October 1st, _____ turned out to be a great success. [ ]
A. which
B. when
C. that
D. it
血热妄行证紫癜患儿,突然出现面色苍白,四肢厥冷,汗出脉微,辨证为()
A.内闭外脱
B.湿热内闭
C.热深厥深
D.阳气郁闭
E.气阳欲脱