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【多选题】关于沉井的平面形状的叙述,以下哪些是正确的?
A.
宜简单对称
B.
长短边长度之比不宜过大
C.
. 圆形受力性能好且在水流中阻力小
D.
平面尺寸大时可设内隔墙或框架
【简答题】The reporting of balance of payments statistics covers all economic transactions between Chinese residents and non-residents.
【单选题】The balance of payments is a statistical record of all the economic transaction between residents of the reporting country and residents of the rest of the world during a given time period. The usual ...
A.
The balance of payments is a digital table of all the economic transactions between residents of the reporting country and residents of the rest of the world during a given time period.
B.
The balance of payments is a figured table of all the economic transactions between residents of the reporting country and residents of the rest of the world during a given time period.
C.
The balance of payments is a statistical record of all the economic transactions between residents of the reporting country and residents of the rest of the world during a given time period.
D.
The balance of payments is a digital record of all the economic transactions between residents of the reporting country and residents of the rest of the world during a given time period.
【单选题】All economic questions are about
A.
how to make money.
B.
what to produce.
C.
how to cope with scarcity.
D.
how to satisfy all our wants.
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