【判断题】在足球比赛中,进攻是化解对方进攻的手段。
【简答题】跳跃场地的沙坑应该填充( )份锯末,( )份沙。助跑道方向应避开( ),踏板应与地面( ),沙坑边缘宜为( )
【单选题】According to the passage, regular physical exercise can make old people ______.
A.
better able to look after themselves
B.
look younger than they really are
C.
less likely to suffer from diseases
D.
more aggressive in their interaction with others
【判断题】半导体式传感器是磁敏、霍尔元件、气敏传感器、压阻传感器及色敏传感器等。
【判断题】利用分光计在任意偏向角方向都能测量棱镜的折射率。( )