缝合时出现皮肤创缘内卷的主要原因是()
A．进针过深
B．打结过紧
C．组织富裕
D．两侧进针深度不一致
E．皮肤切口两侧进针间距大于皮下间距
参考答案：E
In small angle stability，the metacentric height（）.
A.is found in the hydrostatic tables for a level vessel
B.multiplied by the displacement yields the righting moment
C.is always positive
D.is calculated by subtracting KG from KM
期货市场的交易对象是标准化的期货合约；能够套期保值的基本条件是（）市场价格和（）市场价格走势基本一致。
