21.金錢草的性狀特征是(     )

A.莖細(xì)長(zhǎng)，棕色或暗棕色，葉對(duì)生、全緣，花單生或?qū)ι�于葉腋

B.花集生于枝端成密集狀，莖葉均被白毛，葉主側(cè)脈均明顯

C.莖密被黃柔毛，葉互生，背面密被貼伏的灰白色毛茸，全緣

D.莖方形，葉對(duì)生，具透明腺點(diǎn)，邊緣有圓鋸齒

22.藻、菌、地衣類屬于(     )

A.低等植物                                                      B.雙子葉植物

C.蕨類植物                                                      D.單子葉植物

23.根據(jù)其所含主要化學(xué)成分，乳香、沒藥屬于(     )

A.香樹脂                                                         B.酯樹脂

C.油膠樹脂                                                      D.油樹脂

24.火燒時(shí)發(fā)生爆鳴聲且閃光的藥材是(     )

A.青黛                                                             B.海金砂

C.兒茶                                                             D.冰片

25.烏梢蛇的顏色是(     )

A.全體烏黑色，背部有白色斑點(diǎn)                      B.全體灰白色，尾部烏黑色

C.全體烏黑色或黑褐色，被菱形細(xì)鱗               D.全體灰棕色，尾部烏黑色

26.鹿茸中“二杠”的含義是(     )

A.馬鹿茸中具一個(gè)分枝者                                 B.花鹿茸中具二個(gè)分枝者

C.花鹿茸中具一個(gè)分枝者                                 D.馬鹿茸中具二個(gè)分枝者

27.斑蝥胸腹部的顏色是(     )

A.棕黃色                                                         B.烏黑色

C.暗褐色                                                         D.黃色

28.表面亮黃色，有金屬光澤，條痕色為棕黑色或黑綠色的是(     )

A.朱砂                                                             B.磁石

C.自然銅                                                         D.雄黃