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【多选题】
下列属于蚯蚓的外部形态对土壤生活的适应特征的是 ______ 。A.
体长而圆，头部和感官退化
B.
具口前叶，膨胀时可以
C.
皮肤具皮肤腺，能分泌粘液，有背喷出体腔液，起润滑作用
D.
具有环带，分泌蚓茧，保证在土壤中受精、发育
E.
具有后肾管型的排泄器官
F.
闭管式循环系统，提高了血液运输氧气和营养物质的能力
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皮皮学刷刷变学霸
举一反三
【单选题】( )________ is a fact that you've made a mistake again.
A.
It
B.
That
C.
There
D.
This
【单选题】— You've made a mistake and you've _____ the letter 'e'. — Sorry, I'll be more careful next time. [ ]
A.
left out
B.
left over
C.
left
D.
left for
【单选题】Admitting you've made a mistake is a sign of __________, not weakness .
A.
breadth
B.
health
C.
youth
D.
strength
【单选题】听力原文：M: Look at the long waiting line. I'm glad you've made a reservation. W: Because I know a lot of people now like eating out, especially on weekends. M: Yes, what's more, this place is very popula...
A.
At a hospital.
B.
At a restaurant.
C.
At a railway station.
D.
At a booking office.
【单选题】下列哪项属于心功能三级( )
A.
病人患有心脏病但体力活动不受限
B.
体力活动轻度受限
C.
体力活动明显受限
D.
不能从事任何体力活动
E.
病人患无心脏病但体力活动受限
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