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。[ ]
