槐花炒炭后含量下降的成分是()
A.槲皮素
B.异鼠李素
C.鞣质
D.有机酸
E.生物碱
参考答案:B
—I'm going to spend my holiday abroad.Can you take care of my cat?
—________.
A.You have my word
B.Go ahead
C.I just can't help it
D.It was my pleasure
箱形梁温度达到整定温度(),即高于()。