佝偻病极期的主要临床表现是()
A.睡眠不安、易惊
B.全身肌肉松弛
C.多汗
D.骨骼系统改变
E.动作和语言发育迟缓
参考答案:D
Anthropologist Barbara Myerhoff furthered her reputation as an authority on Native American culture with her study of the symbols, myths, and rituals of the Huichol people.
A.deserved
B.retained
C.renewed
D.advanced
某同学用下列物质进行实验,验证铜、铁、银3种金属的活动性顺序,其中不可行的是( )
A.Cu、Ag、FeCl2溶液
B.Fe、Ag、CuSO4溶液
C.Fe、Cu、稀硫酸、AgNO3溶液
D.Cu、Fe、FeSO4溶液、AgNO3溶液