X线片上,牙槽嵴高度应在()
A.牙颈缩窄处
B.牙颈缩窄处下1mm
C.釉质牙骨质界处
D.釉质牙骨质界下1mm
E.冠根交界部
参考答案:D
There was an immediate _____ when the alarm sounded. People fled in different directions. [ ]
A. surprise
B. joy
C. panic
D. wonder
中枢单胺类递质包括()。
A.内源性阿片样物质
B.乙酰胆碱
C.5-HT
D.去甲肾上腺素
E.多巴胺