要达到敬业的要求，就要（）
A、树立正确的职业观
B、干一行、爱一行
C、把敬业作为一种人生态度来对待
D、待遇低就跳槽
参考答案：A, B, C
Tom _______ his homework at home. [ ]
A. doesn't
B. don't do
C. don't does
D. doesn't do
刚玉质耐火材料中Al2O3含量大于84%。（）
