成人视神经孔径大小约为()
A.2mm
B.10mm
C.8mm
D.5mm
E.12mm以上
参考答案:D
The construction of the two new railway lines ________ by now.[ ]
A. had completed
B. have been completed
C. has been completed
D. had been completing
隐性信息是一种特殊信息,它与在社会经济生活可以直接或间接获取的显性信息不同,是一种能够提示并预测未来发展趋势的、未萌的“胎动”信息,它要通过分析研究才能获取。 对这段话中的“隐性信息”,理解正确的一项是( )。
A.不能直接获取,只能间接获取B.可能预测未萌的“胎动”C.可以提示未来的发展趋势D.能提示尚未公开的信息