测定密度时读取试样温度应读准多少？两次平行试验试油温度不应超过多少？

创伤性气胸按胸腔内压力的变化不同分为闭合性气胸、开放性气胸、（）。

Branding through Differentiation

It’s not enough for your company to merely offer a great product or service. To get
ahead of the field, today’s competitive marketplace demands that the business owners
34 establish and develop a distinct brand. It’s important that your brand help them create
35 and further a clear identity, if one that every employee, from the CEO down to the
36 sales team, can understand and get behind with. The brand must be your mantra, and it
37 needs to be the one that can be stated succinctly. The real key to increased
38 market share is differentiation. How you approach the differentiation depends on your
39 particular product or business. The critical starting point is for understanding whether
40 your business or your product is the brand. For instance, although Procter & Gamble
41 sells countless other products, but consumers far more readily recognize P&G’s
42 individual product lines. Mr. Clean, Tide, Crest, Folgers, and Charmin, for example.
43 That’s intentional branding that favors the product, not only the company. However, for
44 most of small businesses, the business itself will be the brand. How you proceed depends
45 on whether your company or product varies greatly from your competitors or whether
you’re one of several companies offering similar goods or services.

下面一些观点或主张，符合可持续发展基本原则的是

①在保护全球环境过程中，发达国家比发展中国家具有更大的责任和义务

②发达国家利用发展中国家对经济发展的需要而转嫁污染

③人类经济活动和社会发展必须控制在资源与环境的承载能力之内

④由于受技术水平限制，发展中国家经济发展也要走“先污染，后治理”的道路

A．①②　　　

B．③④　　

C．①④　　　

D．①③

上午8点，窗外阳光明媚，七年级某班教室仍灯火通明。作为校学生会干部的你发现后，对该班值日生小华说：“         ”(2分)

简析麦克鲁汉的媒介理论。