油罐内需要动火时,需蒸罐时间不少于()小时,罐内气体组分的含O2不小于()。
A、24 20%
B、36 20%
C、48 19.5%
D、60 19.5%
参考答案:C
急性血源性骨髓炎的致病菌是
A.白色葡萄球菌B.金黄色葡萄球菌C.甲型链球菌D.铜绿假单胞菌
Under the Companies Ordinance, 1984 and the Code of Corporate Governance:
(b) describe the duties and powers of a company secretary. (5 marks)