异黄酮的颜色通常为
A．无色B．灰黄色C．橙黄色D．红色E．蓝色
参考答案：A
—Do you need any help, Lucy?
—Yes, The job is ________ I could do myself.
A．less than
B．more than
C．no more than
D．not more than
下列叙述中不正确的是（ ）
A．原子半径：O＞S＞Cl
B．还原性：Na＞Mg＞Al
C．稳定性：HF＞HCl＞HBr
D．酸性：HClO4＞H2SO4＞H3PO4
