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搜题
【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.
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皮皮学刷刷变学霸
举一反三
【单选题】选择最佳答案完成句子。 He saw a __________bird and raised (举起) his bow( 弓 ).
A.
flying
B.
fly
C.
flew
D.
to be flying
【多选题】离子晶体的结构规律主要有 。
A.
节约规则
B.
不同种类正离子配位多面体间连接规则
C.
原子尺寸因素
D.
负离子多面体共用顶、棱和面的规则
E.
电价规则
F.
负离子配位多面体规则
G.
能量最低规则