单代号搭接网络计划十描述前后工作之间逻辑关系的符号有()个
A.2
B.3
C.4
D.5
参考答案:C
In relation to capital and financing:
(a) Explain the legal provisions that govern the redemption of shares on the demand of a shareholder of a shareholding company. (4 marks)
H2A为二元弱酸,则下列说法正确的是
A.在溶质物质的量相等的Na2A、NaHA两溶液中,阴离子总数相等
B.在等物质的量浓度的Na2A、NaHA两溶液中,前者pH大于后者
C.在NaHA溶液中一定有:c(Na+)>c(HA-)>c(OH-)>c(H+)
D.在Na2A溶液中一定有:c(Na+)+c(H+)=c(HA-)+c(OH-)+c(A2-)