所收运的货物的最小体积长、宽、高合计不少于()厘米,最小的一边不得少于5厘米.
A、30
B、40
C、50
参考答案:B
Mark promised me that he would tell Frank my message ______ he met him when he returned to school.
[ ]
A. now that
B. the moment
C. in case
D. even if
在0.1M盐酸溶液中,H+离子和C.l-离子的浓度各为0.0814,表明该溶液中离子的有效浓度是0.0814M,活度系数为()
A.0.0814
B.0.814
C.0.00814