牡丹皮的显微特征是:()
A.淀粉粒众多
B.草酸钙簇晶
C.木栓细胞长方形
D.丹皮酚结晶
E.石细胞
参考答案:A, B, C, D
妈妈每小时打字a个,她上午打了2.5小时,下午打了4小时,妈妈一天共打了多少个字?下午比上午多打多少个字?
—Sorry for the delay.I got lost in the mountain.
—That's OK.You're safe and that's what________.
A.does
B.works
C.stays
D.counts