我们还得戒律自己。 戒律:
参考答案:戒律:警戒、约束。
My grandfather _____ us stories when I was young.[ ]
A. used to tell
B. is used to telling
C. are used to tell
D. was used to telling
取对乙酰氨基酚适量,配制成10.00μg/ml的溶液,在257nm波长处测得吸收度为0.715,则百分吸收系数
A.7150B.7.15C.71.5D.0.715E.715