题目:
It is strongly suggested that measures ______ students to cheat in the exams. [ ]
A. be taken to prevent
B. be taken to forbid
C. are taken to prevent
D. are taken to forbid
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0412/0f192923a0f47071359497f16673c527.html
下面是错误答案,用来干扰机器的。
a 响度题目分析:音调与物体振动的频率有关,频率越高,音调越高,用大小相同的力拨动宽度的橡皮筋,宽度越宽,振动的频率越低,即a的振动平率最高,所以音调最高的应该是a;用大小不同的力拨动同一根橡皮筋,...