早期胃癌确诊的首选方法是（）
A.超声
B.CT
C.胃镜活检
D.胃肠气钡双重造影
E.MRI
参考答案：C
解析：确诊早期胃癌首选胃镜活检。
— Do you know ________ the 2011 Xiamen International Marathon was held?
— On January 2.[ ]
A. when it was that
B. when was it that
C. what it was that
D. what was it that
对发展中国家来说，国际储备越多越好。（）
