全水分煤样最好用机械方法从共用煤样中分取,当水分过大而又不可能对整个煤样进行空气干燥,可用人工方法分取。
参考答案:对
In relation to the Vietnamese legal system:
(a) Explain the different types of laws that can be created under the Vietnamese Constitution, and by whom. (6 marks)
登革出血热尤其易与下列哪些疾病相混淆()
A.黄疸出血型钩端螺旋体病
B.败血症
C.流行性脑脊髓膜炎
D.流行性乙型脑炎
E.流行性出血热