喉返神经和喉上神经均起始于___________。
参考答案：迷走神经
Only after my friend told me _____ . [ ]
A. realized I was wrong
B. was realized I wrong
C. did I realize I was wrong
D. I realized I was wrong
下列关于普通混凝土小型砌块尺寸允许偏差的说法，正确的是( )。
A．优等品的长度允许偏差为±2B．一等品的宽度允许偏差为±2C．合格品的长度允许偏差为±2D．优等品的高度允许偏差为±3
