American Attitude toward Manual Labor

本文探讨了美国文化中对于通过个人努力成功的人的高度评价,尤其是在对体力劳动的态度上。文章详细描述了即使社会地位较高的人也会亲自参与家务劳动的情况,并解释了这种现象背后的原因。
A characteristic of American culture that has become almost a tradition is to respect the self-made man — the man who has risen to the top through his own efforts, usually beginning by working with his hands. While the leader in business or industry or the college professor occupies a higher social position and commands greater respect in the community than the common laborer or even the skilled factory worker, he may take pains to point out that his father started life in America as a farmer or laborer of some sort.


This attitude toward manual(体力的) labor is now still seen in many aspects of American life. One is invited to dinner at a home that is not only comfortably but even luxuriously (豪华地) furnished and in which there is every evidence of the fact that the family has been able to afford foreign travel, expensive hobbies, and college education for the children; yet the hostess probably will cook the dinner herself, will serve it herself and will wash dishes afterward, furthermore the dinner will not consist merely of something quickly and easily assembled from contents of various cans and a cake or a pie bought at the nearby bakery. On the contrary, the hostess usually takes pride in careful preparation of special dishes. A professional man may talk about washing the car, digging in his flowerbeds, painting the house. His wife may even help with these things, just as he often helps her with the dishwashing. The son who is away at college may wait on table and wash dishes for his living, or during the summer he may work with a construction gang on a highway in order to pay for his education. 


小题1:From paragraph 1, we can know that in America _________.
A. people tend to have a high opinion of the self-made man
B. people can always rise to the top through their own efforts
C. college professors win great respect from common workers
C. people feel painful to mention their fathers as labors.


小题2:According to the passage, the hostess cooks dinner herself mainly because _________.
A.servants in American are hard to get
B.she takes pride in what she can do herself
C.she can hardly afford servants
D.It is easy to prepare a meal with canned food


小题3:The expression “ wait on table” in the second paragraph means “_________”.
A.work in a furniture shop
B.keep accounts for a bar
C.wait to lay the table
D.serve customers in a restaurant


小题4:The author's attitude towards manual labor is _______.
A.positive 
B.negative
C.humorous
D.critical


小题5:Which of the following may serve as the best title of the passage?
A.A Respectable Self-made Family
B.American Attitude toward Manual Labor
C.Characteristics of American Culture
D.The Development of Manual Labor


小题1:A
小题2:B
小题3:D
小题4:A
小题5:B 
______

本文介绍了崇尚自我奋斗,尊重体力劳动的美国文化。


小题1:细节题。根据 A characteristic of American culture that has become almost a tradition is to respect the self-made made 我们可以了解到,“崇尚自我奋斗”是美国文化的特点。


A. people tend to have a high opinion of the self-made man (符合题意)
B. people can always rise to the top through their own efforts (没有说can always经常能,只是说那些达到顶峰的人一般是白手起家,而不是白手起家的人总能达到顶峰)
C. college professors win great respect from common workers (不是from,是than)
C. people feel painful to mention their fathers as labors.(绝对不是feel pianful,是take pains,意思是不遗余力地表明:自己多牛hi多白手起家,千方百计要说出;我爸爸什么也没有的呀,农民呀,你看诺,我靠我自己一点点做到教授的呀)


小题2:推断题。根据This attitude toward manual(体力的) labor is now still seen in many aspects of American life.(在美国生活的方方面面,尊重体力劳动态度的现象仍然随处可见),可以推断女主人亲自下厨,是因为她以能做这样的体力活而自豪。


小题3:词义猜测题。wait on table 意为“服务顾客”,注意其后的 washing dishes 也有一定的暗示意义,故答案为 D。


小题4:显然是A.


小题5:主旨题。纵观全文,文章主要讲了美国崇尚自我奋斗,尊重体力劳动的文化习惯。故答案为B。
内容概要:本文介绍了一个基于冠豪猪优化算法(CPO)的无人机三维路径规划项目,利用Python实现了在复杂三维环境中为无人机规划安全、高效、低能耗飞行路径的完整解决方案。项目涵盖空间环境建模、无人机动力学约束、路径编码、多目标代价函数设计以及CPO算法的核心实现。通过体素网格建模、动态障碍物处理、路径平滑技术和多约束融合机制,系统能够在高维、密集障碍环境下快速搜索出满足飞行可行性、安全性与能效最优的路径,并支持在线重规划以适应动态环境变化。文中还提供了关键模块的代码示例,包括环境建模、路径评估和CPO优化流程。; 适合人群:具备一定Python编程基础和优化算法基础知识,从事无人机、智能机器人、路径规划或智能优化算法研究的相关科研人员与工程技术人员,尤其适合研究生及有一定工作经验的研发工程师。; 使用场景及目标:①应用于复杂三维环境下的无人机自主导航与避障;②研究智能优化算法(如CPO)在路径规划中的实际部署与性能优化;③实现多目标(路径最短、能耗最低、安全性最高)耦合条件下的工程化路径求解;④构建可扩展的智能无人系统决策框架。; 阅读建议:建议结合文中模型架构与代码示例进行实践运行,重点关注目标函数设计、CPO算法改进策略与约束处理机制,宜在仿真环境中测试不同场景以深入理解算法行为与系统鲁棒性。
### Godot 中 `move_toward` 函数的使用说明 在 Godot 引擎中,`move_toward` 是一个非常实用的工具函数,用于平滑地将某个数值逐步接近目标值。它不仅适用于简单的数值操作,还广泛应用于游戏开发中的对象移动逻辑。 #### 函数签名 ```gdscript Vector2 move_toward(Vector2 current, Vector2 target, float delta) const ``` - **参数解释** - `current`: 当前的位置或值。 - `target`: 目标位置或值。 - `delta`: 单次调用的最大变化量,控制移动的速度。 - **返回值**: 返回一个新的向量,表示当前值朝着目标值移动了一定的距离,但不超过指定的 `delta` 值。 --- #### 功能描述 `move_toward` 的核心功能是以受控的方式让某变量逐渐逼近另一个目标值。如果两者之间的距离小于等于 `delta`,则直接到达目标;否则仅前进一段固定的距离[^1]。 这种行为非常适合模拟物理效果、AI 追踪逻辑以及任何需要平稳过渡的场景。 --- #### 示例代码 以下是几个典型的使用案例: ##### 1. 敌人追踪玩家 假设敌人需要缓慢靠近玩家角色,则可以利用 `move_toward` 实现这一需求: ```gdscript func chase_state(): # 设置动画状态为跑步 animation_player.play("Run") # 计算方向并调整翻转 var direction = Globals.last_Player.position - global_position if direction.x < 0: sprite.flip_h = true else: sprite.flip_h = false # 更新全局位置,使其逐步靠近玩家 global_position = global_position.move_toward(Globals.last_Player.position, SPEED * delta) ``` 在此例子中,`global_position` 表示敌人的当前位置,而 `Globals.last_Player.position` 则是玩家的目标位置。通过乘以时间步长 (`delta`) 和速度常数 (`SPEED`) 来动态调节每次更新的实际位移大小。 --- ##### 2. 平滑减速停止 当希望物体能够优雅地停下来而不是瞬间静止时,也可以借助此方法完成处理: ```gdscript extends KinematicBody2D const MAX_SPEED = 300.0 var velocity := Vector2.ZERO func _physics_process(delta): var input_direction = Input.get_vector("ui_left", "ui_right", "ui_up", "ui_down").normalized() if input_direction.length() > 0: velocity = velocity.move_toward(input_direction * MAX_SPEED, 10.0) else: velocity = velocity.move_toward(Vector2.ZERO, 5.0) position += velocity * delta ``` 这段脚本展示了如何基于输入指令改变实体的速度矢量,并且无论是否有按键按下都会应用相应的加减速机制来保持流畅感[^2]. --- ##### 3. 绘制像素级线条 除了常规的游戏玩法外,“逐点生成路径”的场合同样适用该技术。比如下面这个绘制直线的例子就很好地体现了它的灵活性: ```gdscript func draw_line(p1: Vector2, p2: Vector2, color: Color): var steps = int(max(abs(p2.x - p1.x), abs(p2.y - p1.y))) for i in range(steps + 1): var t = clamp(float(i)/float(steps), 0, 1) var point = p1.linear_interpolate(p2, t).floored() set_pixel(point, color) ``` 虽然这里并未直接调用 `move_toward`, 不过其背后的思路是一致的——即按照一定比例分割总行程再逐一访问沿途各节点[^3]. --- ### 总结 综上所述,`move_toward` 提供了一个简单却强大的接口帮助开发者轻松达成许多复杂的效果。无论是构建基础物理仿真还是设计高级人工智能模块都离不开这样一类辅助型API的支持.
评论
成就一亿技术人!
拼手气红包6.0元
还能输入1000个字符
 
红包 添加红包
表情包 插入表情
 条评论被折叠 查看
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值