发声功能检查中的客观检测分析方法包括()
A.声带振动检测
B.嗓音声学测试
C.空气动力学检测
D.喉肌电图检查
E.影像学检查
参考答案:A, B, C, D
The weather turned out to be fine yesterday. I ____ the trouble to take my umbrella with me. [ ]
A. could have taken
B. should have taken
C. couldn't have taken
D. needn't have taken
在“探究杠杆平衡的条件”实验中,实验前应调节杠杆两端的______,使杠杆在______位置平衡.两边挂上钩码后,发现杠杆不平衡,则应______,使杠杆在原来位置平衡.