易于染毒化脓的是()
A.胶瘤
B.血瘤
C.脂瘤
D.肉瘤
E.筋瘤
参考答案:C
小华听说寒冬季节放在室外的水缸容易破裂,这是怎么回事呢?他找到一个容积为0.27m3的水缸并盛满了水,在密度表上查出冰的密度为0.9×103 kg/m3,则水缸中:
(1)水的质量为多少?
(2)水全部结成冰后,冰的质量是多少?
(3)水全部结成的冰后,冰的体积为多少?
When he was young, he used to ________ hard at his lessons. [ ]
A. devote to working
B. devote himself to work
C. be devoted to work
D. be devoted to working