某作业给矿品位是50%,精矿品位是65%,计算该作业的富集比。
参考答案:富集比=精矿品位/原矿品位=0.65/0.50=1.3
Darwin counted 225 flowering plants,________he collected and brought home 193.
A.that
B.in that
C.of which
D.all of which
一男性患者,近日心悸,头晕。面色不华,倦怠,舌质淡红。脉象细弱,此治疗方法当()
A.温补心阳,安神定悸
B.滋阴清火,养心安神
C.镇惊定志,以安心神
D.补血养心,益气安神
E.活血化瘀,理气通络