神曲的功效是()。
A.消食和胃
B.解表
C.行气止痛
D.消食化积
E.燥湿化痰
参考答案:A, B
Our teacher told us last night that ___.
A.English is difficult to be learnt
B.the English is difficult to learn
C.the English language is difficult to learn
D.English language is difficult to learn
在浮选过程中,如果形成的泡沫越粘越稳定,则二次富集作用效果越差。