人工后牙半解剖式牙尖斜度为
A．0°B．10°C．20°D．30°E．40°
参考答案：C
She _____________ singing and dancing.[ ]
A. like
B. likes
C. is like
临床研究发现，延长脊麻中利多卡因时效最长的辅助药是去甲肾上腺素。()
