【单选题】第17题 My brother brought me a few reference books, but ________ of them was of any use for my report.
【单选题】要造一个圆柱形油罐,体积为V,问底半径r 和高h 的比值等于( )时,才能使表面面积最小(有盖)
【单选题】《与贸易有关的知识产权协定》中没有给与作品的作者保护的权利的是( )
【判断题】4 我国排放标准是参照美国标准制定的。( )
【单选题】以下属于路基坡面冲刷间接防护设备的是( )。
【单选题】Man: How are things going with your grandmother?Woman: Some days at my brother's have brought the roses to her cheeks.Question: What does the woman mean?
A.
Her brother didn't take good care of her grandmother.
B.
Her grandmother looks very healthy after some days at her brother's.
C.
Her grandmother looks very tired after some days at her brother's.
D.
Her brother has made her grandmother very happy by often buying her roses.
【单选题】以下属于路基坡面冲刷直接防护设备的是( )。
【单选题】测量值与测量目标的真值之差,称为( )。