【名词&注释】
去甲肾上腺素(norepinephrine)、单核细胞(monocyte)、细胞因子(cytokine)、内毒素(endotoxin)、物价水平(price level)、粒细胞(granulocyte)、实际工资(real wage)、促胃液素(gastrin)、总供给曲线(aggregate supply curve)
[多选题]矛盾是
A. 相互冲突的关系
B. 既对立又统一的关系
C. 事物普遍联系的根本内容
D. 事物变化发展的动力和源泉
查看答案&解析
举一反三：
[单选题]主要促使胰腺小导管细胞分泌大量H2O和HC03-的是
A. 血管活性肠肽 B．去甲肾上腺素
B. 胆囊收缩素 D．促胃液素(gastrin)
C. 促胰液素 ．
[单选题]有关细胞因子TNF的描述，错误的是
A. 由激活的淋巴细胞和单核细胞产生
B. 内毒素等致炎因子可促进TNF分泌
C. 可促进白细胞粘附
D. 具有中性粒细胞趋化作用
E. 引起疼痛
[单选题]Passage ThreeIn an age when waste today means a lack tomorrow, making use of every available resource becomes more and more important. As coal is being used in greater and greater amounts to produce electricity, larger amounts of ash, by-product of coal, are produced. When coal is burned
A. in a boiler, two kinds of ash by-product are produced, a heavy bottom ash and a fine-as-powder fly ash that is filtered and captured by precipitators. About 10 to 15 percent of the coal by-product is bottom ash which is used like sand on icy city streets and highways and also on highways as paving material. It is the fly ash, however, that is receiving the greater amount of attention. Fly ash may be used as an additive to concrete in the construction of dams, bricks, and roads, and can replace up to 20 percent of the cement used in concrete. As a by-product of burned coal, fly ash requires no additional expenditure of energy to be produced, while cement production requires great amounts of energy.
B. In addition to using fly ash as a concrete additive, the technology is available to extract the main mineral components-aluminum, silicon, and magnetic. Today, extracting these components is a very expensive process, but the time may come when it is cheaper to extract these products from ash than to mine new supplies.
C. 41. What can be used as a material to pave roads?
D. The coal by-product.
E. Additive.
F. Fine-as-powder fly ash.
G. Both B and C．
[单选题]假如劳动总供给曲线(aggregate supply curve)对实际工资(real wage)的变化不敏感，那么：（ ）
A. 物价水平的下降将导致总供给的下降
B. 劳动总供给曲线(aggregate supply curve)是完全没有价格弹性的。
C. 劳动总供给曲线(aggregate supply curve)是水平的。
D. 劳动总供给曲线(aggregate supply curve)具有完全的价格弹性。
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