固定连接体在基牙近远中面的接触区，其面积不应小于（）。
A.5mm2
B.2mm2
C.6mm2
D.3mm2
E.4mm2
参考答案：E
阅读理解，正确的写“T”，错误的写“F”。
I have nine markers (标志). They are red, yellow, blue, orange, purple, green, black, brown, pink. My
favourite (最喜欢的) colour is orange. Where's my red marker? It's in my pencil-case.
( ) 1. I have ten markers.
( ) 2. Orange is my favourite colour.
( ) 3. I have a white marker.
( ) 4. Red marker is in my pencil-case.
电容式压力传感器可分为（）、（）、（）三种形式。
