题干

能从其唾液中提取蛭素,生产抗血栓药物的环节动物是(    )

A:蜈蚣

B:沙蚕

C:蚯蚓

D:蛭

上一题 下一题 0.0难度 选择题 更新时间:2018-06-19 11:18:04

答案(点此获取答案解析)

D

同类题2

欣赏下面一首现代诗,回答小题。

瀑布

洪 源

                                                                                                   要下山!要出谷!

                                                                                                   一声呐喊,

                                                                                                   从云崖上扑下,

                                                                                                   哪怕它粉身碎骨!

                                                                                                   向往的是——浩浩江河、茫茫大海,

                                                                                                   想念的是——展翼的风帆、击浪的桡橹,

                                                                                                   啊,全凭一腔燃烧的信念,

                                                                                                   脚下,才开辟出一条奔腾的生命之路。

(节选自《中国当代名诗一百首》)