多项选择题
精液是由进入性发育后的男性性腺和附属腺分泌的液体,这些液体由哪些物质组成?
A.分泌物
B.脂肪
C.精子
D.精浆
精液是由进入性发育后的男性性腺和附属腺分泌的液体,这些液体由哪些物质组成?
A.分泌物
B.脂肪
C.精子
D.精浆
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单项选择题
If the solution node is set at the separator, what’s the character of the inflow curve in nodal analysis graph is:
If the solution node is set at the separator, what’s the character of the inflow curve in nodal analysis graph is:
A.Increasing
B.Decreasing
C.Parallel with cross axle
D.Parallel with vertical axle