白前和前胡都具有的功效为
A．发散风热
B．降气化痰
C．宣散风热
D．祛痰利咽
参考答案：B
什么是锅炉水循环？
--- What did he say? ---- He said he ________ the sentence in his own words.
A．was considering to explain
B．considered how to explaining
C．would consider to explain
D．was considering explaining
