单项选择题
The entries in the Official Logbook must be signed by the Master and（）.
A.the Chief Engineer B.the person about whom the entry concerns C.one other crew member D.No other signature is required
填空题 我国通常采用的股利支付方式是（）和股票股利。
单项选择题 菌种鉴定的重要依据（）。
判断题 装煤烟气的粉尘含量约100g/m3，经过除尘之后粉尘含量可降至0.035g/m3。
