【单选题】National saving ( )
A.
is the total income in the economy that remains after paying for consumption.
B.
is the total income in the economy that remains after paying for consumption and government purchases.
C.
is always greater than investment for a closed economy.
D.
is equal to private saving minus public saving.
【判断题】在桥梁悬臂施工和尺寸较大的构件制作中,一般都采用先穿法穿束。
【单选题】化合物CH3CH2CH=CHCH(CH3)2下列名称正确的是:
【单选题】采用TOKEN Ring机制的网络中,发送信息必需先得到
【判断题】曾侯乙编钟使古代中国音律达到空前水平,但从目前所知战国钟在其它地区当时尚未普遍达到这一水平。()
【判断题】曾侯乙编钟使古代中国音律达到空前水平,但从目前所知战国钟在其它地区当时尚未普遍达到这一水平。