溃疡病
A.呕血伴皮肤黏膜出血B.呕血伴脾肿大、腹壁静脉曲张C.呕血伴黄疸D.呕血伴有慢性、周期性的上腹痛E.呕血、上腹痛无规律且伴食欲减退、消瘦者
参考答案:D
There is no doubt _______ nearsightedness is a serious problem among the youth of our country.
A./
B.which
C.whether
D.that
眼部骨组织图像显示的窗宽、窗位是:()
A.W1500~2500,C300~800
B.W3500~5500,C800~1000
C.W150~250,C30~60
D.W-500~-800,C30~60
E.W-1500~-2500,C300~600