【判断题】利用框架面板中的“边框”属性用于设置当前框架是否显示边框以及边框的大小。
【单选题】远志中具有祛痰作用的有效成分主要是 ( )
【简答题】人参主要含的是A.香豆素类成分 B.木脂素类成分 C.三萜皂苷类成分 D.挥发油 E.生物碱类成分 薄荷主要含的是A.香豆素类成分 B.木脂素类成分 C.三萜皂苷类成分 D.挥发油 E.生物碱类成分
【单选题】What can be inferred about the man?
A.
He does not go clothes shopping often.
B.
He does not know how to sew on buttons.
C.
He did not know that the shirt was on sale.
D.
He did not examine the shirt before buying it.
【单选题】What is the main thesis of thearticle?
A.
Volcanic eruptions are not alwaysdeadly.
B.
Carbon dioxide emissions often giverise to global warming.
C.
Older volcanic eruptions are moredestructive
D.
It is not easy to calculate the killingpower of a volcanic eruption