【单选题】有三种溶液分别是NaCl、CaCl 2 、C 6 H 12 O 6 ,它们的浓度均为0.1mol/L,按渗透压由高到低排列的顺序是
A.
CaCl 2 ﹥NaCl﹥C 6 H 12 O 6
B.
C 6 H 12 O 6 ﹥CaCl 2 ﹥NaCl
C.
NaCl﹥C 6 H 12 O 6 ﹥CaCl 2
D.
C 6 H 12 O 6 ﹥ NaCl﹥CaCl 2
【简答题】完形填空。 Li Lei is a student 1 Class Two, Grade Seven. He likes football very 2 . He often plays it after school. And he often goes home 3 . His home is 4 the school. His mother doesn't worry 5 him. One ...
【单选题】—He likes football very much.—
【简答题】(11分)有关物质的量的计算。 (1)有NaCl、CaCl 2 、AlCl 3 三种溶液,若溶质的物质的量相等,分别与足量的硝酸银溶液反应,则生成沉淀的物质的量之比为________________.若生成的沉淀的质量相等,则三种溶液中溶质的物质的量之比为__________。 (2)相同质量的SO 2 和SO 3 ,所含分子的数目之比为_________;所含O的物质的量之比为________。...
【判断题】装箱单上的总数量和总件数应与商业发票上的总数量和总件数保持一致。
【单选题】He likes football , so he football every day.
【简答题】六神曲的炮制属于( )。A.发酵法B.制霜法C.发芽法D.复制法A. 1 B. 1 C. 1 D. 1
【单选题】He likes football very much. He wants _____ a football player. He likes football very much. He wants _____ a football player.
【判断题】装箱单上的总数量和总件数应与发票上的总数量和总件数一致。(
)