下列黄酮类化合物中与盐酸-镁粉反应不显色的是（）
A.槲皮素
B.芦丁
C.橙皮苷
D.黄芩苷
E.儿茶素
参考答案：E
有效循环血量
— What a fine day! How about going for a ride?
—_________. But we need to be home before six o’clock for the baseball match.
A．I have no idea
B．Excuse me
C．You’re right
D．Sounds great
