按索赔依据不同，工程索赔可分为（）
A.工程变更索赔
B.合同之内索赔
C.劳务合同索赔
D.合同之外索赔
E.道义索赔
参考答案：B, D, E
Don't ask me to prepare the picnic lunch, I'm not _______ a cook. [ ]
A. much of
B. better than
C. good at
D. much as
通信明线回线中出现不平衡电阻，是因为导线接头接触不良和（）所造成。
