治疗蝶窦恶性肿瘤的方法是()。
A.首选手术治疗
B.以放射治疗为主
C.以手术治疗为主
D.首选化学治疗
E.以上方法均不是
参考答案:B
________, they had no chance of winning the war. [ ]
A. As they fought bravely
B. Bravely as they fought
C. As bravely they fought
D. They fought so bravely
化学与生活密切相关,生活中常见的现象属于化学变化的是
A.蜡烛燃烧
B.冰雪融化
C.香水挥发
D.干冰升华