关于甲醇的性质,下列说法正确的是()。
A.不易挥发
B.无毒
C.能与水作任何比例的混合
D.不能燃烧
参考答案:C
增强子必须位于基因的上游才能起增强效应,但与其方向无关。 ( )
In relation to international business transactions explain:
(b) the function of the bill of lading in relation to the passage of risk in the context of the UN Convention for the International Sale of Goods. (5 marks)