Alzheimer病的确诊依据是（）.
A.病史
B.智力量表检查
C.头颅MRI
D.病理检查
E.脑电图检查
参考答案：D
Excuse me, ______ do you say that in Chinese? [ ]
A. what
B. how
C. when
D. who
_____ of the surface (表面) of the earth is covered with water.[ ]
A. First third
B. Two thirds
C. One three
