不定型密封材料包括( )。
A．沥青嵌缝油膏
B．密封条带
C．止水带
D．硅酮密封膏
E．塑料油膏
参考答案：A,D,E
生物既能适应环境又能改变环境。（ ）
Knowing what colors look good _______ your skin is of great importance when you buy clothes.
A．beyond
B．within
C．against
D．over
