搜题请搜索小程序“爱下问搜题”
问题 选择题

下列动物中都属于环节动物的是 [ ]

A．蚯蚓和涡虫

B．蚯蚓和沙蚕

C．蚯蚓和蛔虫

D．水蛭和水螅

答案

答案：B

选择题
He _____ the club and _____ its activities.

A. took part in; joined
B. joined; took part in
C. joined; took a part in
D. took part in; took part in
查看答案
单项选择题

以下哪个研究的入组对象是首次接受血液透析治疗的患者（）

A.RIND研究

B.TTG（Treat-to-Goal）治疗达标研究

C.Blacher研究

D.DCOR研究
查看答案