电磁机构的（）特性和反作用力特性，一起表征出电磁机构的工作性能。A、吸力 B、拍合 发布时间：2017-07-27 13:54 │ 来源：www.tikuol.com 题型：单项选择题 问题： 电磁机构的（）特性和反作用力特性，一起表征出电磁机构的工作性能。A、吸力B、拍合C、释放D、吸合
题型：单项选择题 [案例一]患者李××，女性，27岁，G1P0，妊娠36+5周，由于骑车，被撞到，当时觉腹部不适，无 * * 流血，急症就诊。查体：血压90/60mmHg，脉搏92bpm，胎儿心率：160bpm。此时合适的处理有A．卧床休息B．胎心监护C．B超检查D．观察血压变化E．CT检查F．收入院观察G．剖腹探查H．急查血液指标如血常规、凝血功能 查看答案
题型：单项选择题 任务型读写。 From the beginning of human history, people have used oils from seeds and nuts.Most of the time these oils are used as food, especially in cooking.But sometimes they have other uses.For example, oils are used in paint and in cleaning products like soap. Oils are separated from seeds by using pressure.A machine called a press is often used. The first step in pressing the oil from seeds is to crush the seeds between two stones.The crushed seeds are then put into a cloth bag and the bag is hung up.Some of the oil will flow out of the bag and can be collected. But some oils will remain in the crushed seeds inside the bag.The easiest way to get the rest of the oil out is to place heavy rocks on the crushed material. Another method is to place several cloth bags on top of each other in a box.Then a long wooden stick is used to slowly push a heavy cover down on the bags.Great pressure is produced in this way.Much greater pressure can be produced by using a machine, a hydraulic jack (液压千斤顶). The greater the pressure is, the more oils will be produced. Small presses are important in areas where electricity or gasoline cannot be used.They are also a good way to test if a local market for oils exists. Small batch presses can be made of local materials.Their cost is low.They are not difficult to operate.And they are easy to repair.The small presses produce good quality oils.But the work is hard.And getting all the oil from the seeds can be difficult. If there is a large supply of seeds, then handoperated presses may not be enough to support a business.Large powered presses that can operate all day are needed.TitleHow to 1.________Oils from Seeds2.________of oilsPeople use oils when they cook meals, paint pictures and clean objects.Method 1●Crush the seeds between two stones and then put them into a cloth bag. ●3.________the cloth bag up.Some of the oil will flow out of the bag.●The 4.________oil in the seeds can be got by putting more heavy rocks on them.Method 2●A box is used to 5.________several bags of seeds. ●Place a heavy cover on the bags. ●Use a long wooden stick to push the cover slowly. ●The 6.________of oils relies on the pressure placed on the bags.Small batch presses●They are at a low 7.________. ●They are easy to operate and repair. ●They can be used in areas 8.________of electricity or gasoline. ●They can be operated by hand very conveniently. ●They can produce good quality oils.Large 9.________ presses●It is easy to get all the oil from the seeds.●They can 10.________with a large supply of seeds and support a business.●They can run all day. 查看答案