| Advertisers tend to think big and
perhaps this is why they’re always coming in for criticism. Their critics seem
to resent them because they have a flair for self-promotion and because they
have so much money to threw around. "It’s iniquitous," they say, "that this
entirely unproductive industry (if we can call it that) should absorb millions
of pounds each year. It only goes to show how much profit the big companies arc
making. Why don’t they stop advertising and reduce the price of their goods
After all, it’s the consumer who pays." The poor old consumer. He would have to pay a great deal more if advertising didn’t create mass markets for products. It is just because of the heavy advertising that consumer goods are so cheap. But we get the wrong idea if we think the only purpose of advertising is to sell goods. Another equally important function is to A. impressive. B. nonconformist. C. insightful. D. unappealing. [判断题]指针式万用表测量线路是用来把各种被测量转换到适合表头测量的微小直流电流的电路。
A.正确 B.错误 [单项选择]声在介质中的传播有纵波、横波和表面波三种方式，下列正确的是（）。
A. 在固体中有纵波和横波两种方式 B. 在液体中有纵波和横波两种方式 C. 在气体中有纵波和横波两种方式 D. 在真空中有纵波和横波两种方式 E. 在生物组织中以纵波为主 [填空题]外力作用包括（）、（）、（）、（）和（）等作用。
[单项选择]在PCR反应中，变性、复性、扩增温度依次为（）。
A. 95℃，72℃，52℃ B. 95℃.52℃，72℃ C. 72℃，95℃，52℃ D. 72℃，52℃，95℃ E. 52℃，72℃，95℃ [单选题]()又名间羟胺,用于治疗心源性、过敏性、中毒性或外伤性休克。
A.阿拉明 B.可拉明 C.多巴胺 [单项选择]催化α-酮戊二酸和NH3生成相应含氮化合物的酶是：（）
A. 谷丙转氨酶 B. 谷草转氨酶 C. 谷氨酸脱氢酶 D. 谷氨酰胺合成酶 [判断题]进入新世纪新阶段, 我国进入发展关键期、 改革攻坚期和矛盾凸显期, 经济社会发展呈现一系列新的阶段性特征。 ( )
A.正确 B.错误 [简答题]列车技术作业手信号显示传递有哪些要求？/84、列车技术作业传递安全防护插设信号时有哪些要求？
[简答题]简述下列水生花卉的形态特征与用途。水葱
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