对放射治疗敏感性差的肿瘤为（）
A.乳腺癌
B.性腺肿瘤
C.食管癌
D.多发性骨髓瘤
E.胰腺癌
参考答案：E
The computer system ___ suddenly while he was searching for information on the Internet.[ ]
A. broke out
B. broke up
C. broke down
D. broke in
高老太爷一病不起的原因是什么？
