焦炉集气管支撑在（）上。
A. 焦炉炉顶
B. 钢柱
C. 保护板
下列哪个货币对属于交叉盘（）
A. USD/JPY
B. AUD/USD
C. AUD/JPY
D. USD/CNY
Theheightofalightismeasuredfromwhichreferenceplane?（）
A. Meanlowwater
B. Meanhighwater
C. Averagewaterlevel
D. Geographicalsealevel
Theheightofeyecorrectionissmallerthangeometricaldipbecauseof（）.
A. theanglebetweenthehorizontalandthelineofsighttothevisiblehorizon
B. indexerror
C. parallax
D. terrestrialrefraction
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