如图所示,兰兰做有关声现象的实验时,将一个正在发声的音叉贴近面颊,目的是为了
A.感受发声音叉的振动
B.体验发声音叉的温度
C.估算发声音叉的质量
D.判断声音的传播速度
答案:A
My daughter went to see her grandma by bus, but I _____ her there. [ ]
A. must have driven
B. should have driven
C. could have driven
D. might have driven
反社会型人格障碍