癃闭形成的病理因素有()
A.湿热
B.痰饮
C.热毒
D.气滞
E.痰瘀
参考答案:A, C, D, E
Joan together with her parents ____ going to visit the Summer Palace this Saturday.
A.is
B.was
C.are
D.were
粉料风送系统的氧含量控制在1%以下,正常值为()%。
A、0.08-0.09
B、0.06-0.07
C、0.05-0.06
D、0.01-0.02