对放射线敏感的肿瘤是
A.恶性黑色素瘤
B.颌骨肉瘤
C.脂肪肉瘤
D.颌下腺腺癌
E.以上都不是
参考答案:E
Johnson was much depressed as he didn’t sell half as many computers as he thought he____.
A.will
B.did
C.was
D.would
秋高气爽,同学们登高原望,心旷神怡,调节人体登山的系统是神经系统。[ ]