固定义齿修复中，牙齿仍可以选作基牙的倾斜度为（）
A.35°
B.40°
C.30°
D.45°
E.60°
参考答案：C
情景问答。
1. Alice: Good morning, Wang Lin.
Wang Lin: [ ]
A. Good morning, Alice.
B. Goodbye, Alice.
2. Tom:
Jim: My name's Jim.[ ]
A. Nice to meet you.
B. What's your name?
3. John:
Kate: Nice to meet you, too.[ ]
A. Good morning, Kate.
B. Nice to meet you.
4. Peter: Mom.
Mom: Nice to meet you, John.
John: Nice to meet you, too.[ ]
A. Good morning.
B. This is John.
（）实现对物联网中物体标识和位置信息的获取。
A.感知技术
B.识别技术
C.微机电系统
D.嵌入式系统
