What Is a Wheel and Axle?Lloyd G. Douglas
This simple machine provides an enormous mechanical advantage in performing the work of moving objects from one place to another. By turning about an axle, the wheel overcomes the friction that would be generated by dragging the load it carries. The mechanical advantage of a wheel is gained by...
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这个回答按我们中文来说是对的，问题是“它是什么？”回答为“它不是一辆自行车。”看起来没问题，但是“what is it ”这个问题一般我们针对当时的语境来回答比较妥当。
百度试题 结果1 题目用be动词或a/an填空。1. What this? It's wheel. 相关知识点: 试题来源: 解析 1. is/a 反馈 收藏
There is a big wheel in the amusement park. What is a big wheel? A. slide B. carousel C. swing D. seesaw 相关知识点: 试题来源: 解析 B。解析:选项 A“slide”是滑梯;选项 B“carousel”是摩天轮;选项 C“swing”是秋千;选项 D“seesaw”是跷跷板。题干中提到的“big wheel”是摩天轮,所以...
百度试题 结果1 题目Θ(B)- This is a wheelA. What is this?B. What is that?C. Whose is that? 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
What Is a Wheel Loader? A wheel loader is a piece of heavy machinery used to load and carry materials across a job site. Wheel loaders can haul fine materials like sand or large objects like rock and demolition debris. While they’re often used in construction, loaders also play a role ...
解析 没这样回答的啊,你不能说“这不是什么什么”,你要说“这是什么……” 回答It is a wheel才是对的 分析总结。 没这样回答的啊你不能说这不是什么什么你要说这是什么结果一 题目 what is it?it is not a wheel. 答案 没这样回答的啊,你不能说“这不是什么什么”,你要说“这是什么……”回答...
two wheels, while the other end has legs and a set of handles. When the wheelbarrow is in a resting position, the legs keep it upright; when it's in motion, the user lifts the legs up with the handles and pushes or pulls the load, with most of the weight balanced on the wheel ...