产前检查的时间从何时开始?()
A.妊娠20周
B.妊娠12周
C.早孕确诊时
D.妊娠28周
E.妊娠30周
参考答案:C
基础数据业务客户交付的主要内容包括()。
A.开通测试、
B.提供测试报告、
C.业务手册、
D.现场培训。
Not until ___to do my homework ____ how much time I had wasted playing computer games.
A.I began; I realized
B.I began; did I realize
C.did I begin; I realized
D.did I begin; did I realize