不易的

Compared with other flocculants, the polymeric ferric sulfate has much better performance and characteristics, such as better adsorption, bridge erection, flocculation, floc formate fast, not easy to breaking, better repolymerization and weak corrosion. So it was widely used in the wastewater purification and treatment which contains industrial wastewater, urban sewage, water for industrial use and potable water etc.

与其它的絮凝剂相比较，聚合硫酸铁不但具有较强的吸附、架桥、絮凝沉淀性能，而且在水处理过程中有生成絮体速度快、絮体不易破碎、重聚性能好、腐蚀性小等特点，因此广泛用于工业废水、城市污水、工业用水以及生活饮用水等的净化处理。

Results:①As for slow and quick transferring methods, the strips of prestained marker in nitrocellulose membrane were stronger than those of nylon and PVDF membranes, and the face and reverso sides of nylon and PVDF membranes were easily confused;②The picture of PVDF through DAB method was slightly clearer than that through nitrocellulose and nylon membrane, and the quick transferring strips were not so regular as the slow transferring strips.

结果1。在快慢转法中硝纤膜的蛋白预染marker条带略强于尼龙膜，而尼龙膜又略强于PVDF膜； PVDF膜和尼龙膜的正反面易于混淆，而硝纤膜的正反面不易混淆。2。

This thesis explores the feasibility of using synthetic jet actuators for the propulsion of small underwater vehicles. This work was inspired by the widespread use of pusatile jet propulsion by sea creatures such as squid, salp, and jellyfish. The jets created by these animals utilize vortex rings for thrust production.

由於养殖渔业具有短期供给缺乏弹性、易腐败、不易储存等特性，更因为养殖业的交易性质，大多是在货到当天立即透过价格的调整，将到货量全部结清，所以数量与价格的关系，应该是数量影响价格，故本研究透过逆需求系统求算所有参数。

For making the big experiment, not easy operation and small experiment of observations that some inconvenience move also can enter the classroom, also for giving give lessons the teacher to have the larger space in the aspects of choosing to play to show to experiment, the easy to teacher prepare lessons, the benefit communicates in the intercollegiate, the benefit takes a look at and considers in the classmate lesson remaining, so make already have of play to show experiment to carry on carefully selectedly into the lesson piece.

为了使一些不便搬动的大实验、不易操作和观察的小实验也能进入课堂，同时也为了给授课教师在选择演示实验方面有更大的空间，便于教师备课，利于校际交流，利于同学课余观看和思考，因此把已有的演示实验进行精选做成了课件。

Article 12 As for the packing site of a food additive or the production site of a compound food additive, its walls and roof shall be built with innocuous materials which are light colored, dampproof, anti-corrosive, innocuous, watertight and not easy to peel off, and the ground shall be smooth, skidproof, wearable, innocuous, corrosion-resisting, watertight and easy to cleanse.

第十二条食品添加剂的产品包装场所和复合食品添加剂的生产场所，其墙壁和屋顶应采用浅色、防潮、防腐蚀、防毒、防渗和不易脱落的无毒材料，地面应平整防滑、耐磨、无毒、耐腐蚀、不渗水、便于清洗。

Students who are easily rejected have lower self-conscious and it's not easy for them to notice and realize the negative behaviors between peers. Keywords: Self awareness ,Sociometric status ,Interpersonal relationships

三受拒绝型的学生有较低的自我觉察，不易察觉自己在同侪间负向的行为。

However, the sampling distributions are usually so complicated, this makes establishing the exact confidence interval very difficult. Cheng and Spiring (1989) proposed a Bayesian procedure for assessing process capability index Cp. Chan et al.

然而，大部分制程能力分析的文献都是基於传统频率学派方法所作的推论，但由於估计式之抽样分配往往太过复杂而使得准确的信赖区间并不易求得。

Traditional operation has not satisfied the reconstructive effect of severe symblepharon, which was due to chemical burn.

化学性灼伤导致瞼球往往发生严重的黏连，而传统的手术方法却不易达到满意的效果。

The application of virt ual reality in architecture is a very hot topi c. In a walkthrough system, a user can observe the architecture in different vie w interactively. This paper discusses the characteristics and requirements of a real time walkthrough system.

虚拟现实技术在建筑环境实时漫游中的应用一直是人们关注的热点，建筑师一般采用效果图来表达自己的设计思想，以前效果图都是手绘完成，花费时间长，不易修改。

But, for the Type 3 of unequilibrated meteorites, its difficult to determine their chemical groups exactly as the mineral composition varies in a large range and probably there is water in the meteorites.

对于岩石类型为第3类的非平衡陨石，由于矿物成分变化较大，并可能有水等易挥发成分的存在，其化学群的划分不易确定。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐