3. 具有毒性的药用植物是 (               ) 。

A. 徐长卿                                                                B. 乌头

C. 獐牙菜                                                                D. 大戟

E. 萝芙木

4. 具有药效作用的菌类植物是 (               ) 。

A. 茯苓                                                                    B. 紫芝

C. 大蓟                                                                    D. 猪苓

E. 马勃

5. 以茎藤入药的植物是 (               ) 。

A. 钩藤                                                                    B. 决明

C. 杜仲                                                                    D.