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【单选题】
二氯氧锆-枸橼酸反应中,先显黄色,加入枸橼酸后颜色显著减退的是A.
5-OH 黄酮
B.
黄酮醇
C.
7-OH黄酮
D.
4’-OH黄酮醇
E.
3-OH黄酮
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皮皮学刷刷变学霸
举一反三
【单选题】The most destructive element in the human mind is fear．Only when we are no longer afraid _______ to live．
A.
we are beginning
B.
begin we
C.
we begin
D.
do we begin
【简答题】The child seemed to have a(n) ______ (normal)fear of strangers.
【单选题】Fear becomes a problem only when ______ .
A.
the danger is thought greater than it really is
B.
eth danger is ore psychological than physical
C.
one cannot stand the danger
D.
one is not well prepared for it
【简答题】[性状鉴别]常卷缩成团;根茎横生呈不规则圆柱形,具短分枝,长1 ~ 1Com,直径0.2~0. 4em:表面灰棕色,粗糙有环节.节间长0.2 ~0.3cm,分枝顶端有碗状的元根细长,商生上,表面灰黄色 平清或具纵皱纹有领根及须根痕:质脆,易折断,断面家黄白色或白色:气辛香,味辛辣麻舌。 [功能主治]解表散寒,祛风止痛,通窍,温肺化饮。
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