正中咬合时，上颌第一磨牙的近中颊尖咬于下颌第一磨牙与第二磨牙之间称为（）
A．近中错
B．远中错
C．锁
D．正中
E．深覆
参考答案：A
用所给词的适当形式填空。
1. Hangzhou is a beautiful city in China. A lot of people go ______ (sightsee) there every year.
2. Jim ______ (play) computer games this evening. He doesn't want to go to the movie.
3. Dalian is a beautiful city. I ______ (plan) to go there for vacation again next summer.
4. It's twelve now. The children ______ (have) lunch in the cafe.
5. We ______ (go) to the beach and ______ (go) swimming this weekend.
老年期抑郁症情感障碍特点是（）
A.情感低落伴有焦虑症状
B.情感低落
C.情感淡漠
D.情感脆弱
E.情感倒错
