pss的口干燥症中需除外（）
A.进固体食物时需伴水送下
B.复发性口腔溃疡
C.猖獗性龋齿
D.讲话时需频频饮水
E.成人腮腺炎
参考答案：B
The desks and seats can be used for a long period of time, they _____ the height of the children. [ ]
A. must be adjusted to
B. can be adjusted to
C. must adjust to
D. can adjust to
