This typifies the way in which engineers work to help people and create a better quality of life. The fact that this country has the most efficient agricultural industry in the world is another good example. Mechanical engineers have worked with farmers and biologists to produce fertilizers, machinery and harvesting systems. This team effort has now produced crops uniformly waist high or less so that they are better suited to mechanical harvesting. Similar advances with other crops have released people from hard and boring jobs for more creative work, whilst machines harvest crops more efficiently with less waste. Providing more food for the rapidly increasing population is yet another role for the mechanical engineer.
According to the passage, when would most weight be imposed on hip-joints?
A.When one is walking.
B.When one is running.
C.When one is standing.
D.When one is lying down.
第6题
关于皮肤纤维瘤不正确的是
A、好发于成年女性
B、常见的发病部位是小腿伸侧
C、圆形或卵圆形坚实结节
D、组织病理分为纤维型损害和细胞型损害两种
E、治疗首选激光治疗
第9题
对于银屑病的叙述,不恰当的为
A、肘膝对称发生
B、好发于四肢伸侧
C、皮疹特点:银白色鳞屑、薄膜现象、点状出血
D、病程慢性
E、多为冬轻夏重
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