关于凡士林基质的表述错误的是() A.凡士林是由多种相对分子质量

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问题单项选择题 A型题

关于凡士林基质的表述错误的是()

A.凡士林是由多种相对分子质量的烃类组成的半固体状混合物

B.凡士林是常用的油脂性基质

C.凡士林吸水性很强

D.常温下100g凡士林吸收水的克数即为凡士林的水值

E.凡士林性质稳定，无刺激性

答案

参考答案：C

单项选择题

A．Britain and the US have proposed writing off more than 30 million dollars of debt with Africa.

B．About five million African children under the age of 5 are dying every year, many from preventable, treatable diseases.

C．International efforts to reduce hunger and infant mortality are falling short of their targets.

D．In 2001, the United Nations adopted eight ambitious development goals to be achieved by 2015.

问答题简答题

20世纪后期人们对汉字进行思考和论争的成绩表现在哪些方面？