磷的固定作用
参考答案：
将土壤可溶性或速效磷转变成为不溶或缓效态磷的过程。
Of the various schemes that have been proposed to model how gene transcription might work in the living body, those involving actual physical contact between enhancers and genes remain -------, owing to an absence of direct evidence.
A．surreptitious
B．decipherable
C．vindicated
D．suspicious
E．(E) speculative
肝与脾在生理功能上的相互联系有（）
A.肝气疏泄，以助脾之运化
B.脾生血，使肝有所藏
C.肝藏血，脾统血，使血不离经脉
D.脾胃湿热可熏蒸肝胆
E.肝胆火旺，横逆犯脾
