善治尿血或血淋的药物是（）
A.白茅根
B.侧柏叶
C.地榆
D.艾叶
E.炮姜
参考答案：A
That________my first visit to Hong Kong,I didn't know where I should go first.There were so many
things to enjoy.[ ]
A. was
B. being
C. to be
D. to have been
装置从界区引入燃料气前，炉前阀、调节阀、一次阀和旁通阀均关闭，有关排放阀打开。（）
