微生物的生长繁殖只需要碳源、氮源、无机盐、生长素和水。
参考答案：错
15. —When Lily fainted, we could have turned to your father for help.
—Yes, sending her to hospital _________ necessary.
A．hadn’t been
B．wasn’t
C．wouldn’t be
D．weren’t
前交叉韧带损伤
A．与相应的椎骨平面相差2节B．与相应的椎骨平面相差1节C．与相应的椎骨平面相差3节D．胸椎10～12之间E．胸椎12到腰1之间
