原发性甲状旁腺功能亢进症的临床表现包括()
A.骨痛、骨畸形
B.泌尿系结石
C.食欲减退、便秘
D.手足搐搦
E.消化性溃疡
参考答案:A, B, C, E
_____ is expected, according to the survey, is that prices of houses will not go up any longer.
A.It
B.As
C.Which
D.What
家用燃气热水器的安全系统由什么组成?