超星 - 第七次作业 - 查题吧

单选题

将下列各组化合物按酸性减小的顺序排列。a.CH3CH2COOH b.CH3CHClCOOH c.CH2ClCH2COOH d.CH2BrCH2COOHA a>b>c>dB b>c>d>aC b>d>c>aD c>d>b>a

A
B
C
D

单选题

将下列各组化合物按酸性减小的顺序排列。a.HCOOH b.HOOC—COOH c.HOOC—COO－A a>b>cB b>c>aC b>a>cD a>c>b

A
B
C
D

单选题

下列化合物中，能脱水生成内酯的是：A. a-羟基丁酸 B. b-丁酮酸 C. b-羟基丁酸 D. 水杨酸 E. d-羟基戊酸

A
B
C
D
E

单选题

与稀硫酸共热，生成的产物能起银镜反应的是：A. 丙二酸二乙酯 B. 乙酰乙酸乙酯 C.a-羟基丁酸 D. b-羟基丁酸 E. d-羟基戊酸

A
B
C
D
E

判断题

The theories of Smith and Ricardo show that countries should not engage in international trade for products that it is able to produce for itself.

A. 对
B. 错

判断题

Heckscher-Ohlin theory supports the case for unrestricted free trade between nations.

A. 对
B. 错

判断题

Mercantilist doctrine advocates unrestricted free trade between countries.

A. 对
B. 错

判断题

A country has an absolute advantage in the production of a product when it is more efficient than any other country in producing it.

A. 对
B. 错

判断题

According to Ricardo's theory of comparative advantage, countries shall not produce a good, even if they have an absolute advantage in its production, if they do not produce it efficiently.

A. 对
B. 错

单选题

【单选题】下边列各项中属于企业资产的是( )

A. 应付账款
B. 实收资本
C. 销售收入
D. 原材料

3