白土对各种烃类的吸附能力怎样?
参考答案:
在白土精制条件下,白土对各种烃类的吸附能力较微弱,其吸附顺序如下:胶质>芳香烃>环烷烃>烷烃,环数越多,越易被吸附。
对Java程序而言,输入/输出主要包括哪三个方面。
What many people wonder is ______ there is any connection between our senses and our health. [ ]
A. that
B. how
C. whether
D. why