工程师在收到正式最终报表及结清单后（）天内，其应向业主递交一份最终付款证书。
A．7
B．14
C．28
D．30
参考答案：C
–What’s troubling him? ______did Jim look quiet with his friends around.
--He’s considering a new project in his company.
A．How
B．Why
C．Fairly
D．Seldom
影响幼儿有意注意发展的因素有哪些？
