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【单选题】
单选题 题目: ()是AGV的基础,一般包括AGV的驱动单元、举升单元、支架等等,它规划了AGV各机械部件的布置、配合等,确定了小车基本的移动、转弯、移载货物的方式。 选项:A.
蓄电池与充电系统
B.
AGV机械结构
C.
定位导航单元
D.
通讯单元
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举一反三
【单选题】The air fresh after the rain. And the sky is blue.
A.
feels
B.
tastes.
C.
smells
D.
sounds
【简答题】用所给词的适当形式填空。 1. She wants to tell us about English. (learn) 2. The boy didn't his homework last night. (do) 3. The woman will to Beijing in autumn. (go) 4. I have a lot of words in primary school.(lea...
【简答题】enjoy the fresh air
【单选题】下列有关生殖毒理学和发育毒理学概念的描述，哪项不正确
A.
生殖毒理学和发育毒理学是毒理学的两个分支
B.
致畸试验是发育毒性试验之一
C.
二者研究的侧重点不同
D.
二者也可统称为繁殖毒理学
E.
发育毒理学比生殖毒理学更全面
【单选题】The air in the house does not remain fresh very long. It's because ______.
A.
the fresh air can't come into the house
B.
there is only a little fresh air coming in and a little waste going out
C.
the air in the house can't remain fresh
D.
the house gives off wastes
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