理性认识的特点是 （　　）

【名词&注释】

客观性(objectivity)、历史性(historical)、理性认识(rational knowledge)、感性认识(perceptual knowledge)、感受器(receptor)、圆柱面(cylindrical surface)、动作电位潜伏期、实在性(substantiality)、执行计划(implementation plan)、各种类型(various type)

[单选题]理性认识的特点是 （　　）

A. 直接性和形象性
B. 间接性和抽象性
C. 客观性和实在性^{(substantiality)}
D. 具体性和历史性

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学习资料：

[单选题]在空间直角坐标系中，方程x2-4(y-1)2=0表示

A. 两个平面
B. 双曲柱面
C. 椭圆柱面
D. 圆柱面

[单选题]It is often easier to make plans than to ________ them out．

A. put
B. carry
C. take
D. practice

[单选题]__________

根据以下内容，回答下面的题目。Investors can _51_ money simply by loaning it．The money they loan is called capital．Security (担保) is an expensive item which the borrower mortgages (抵押) to the investor to show that he intends to _52_ the debt．The way investors make money on loans is to charge interest．Interest is money that _53_ pay to investors for the use of their money．Interest is usually a certain percentage of the capital．Investors sometimes _54 ten percent or more interest per year．The interest may be calculated daily, monthly, or yearly．The interest must be _55_ before the capital can be repaid．If the interest is not _56_ the agreed rate, the interest is added _57_ the capital．Then the borrower has _58_ pay interest on the unpaid interest _59_ on the capital．A debt can grow quickly this way．If the total of the capital and accumulated interest gets too high, the investor will take _60_ of the item used as security and sell it to get his money back．__________

A. borrowers
B. lenders
C. peoples
D. others

[单选题]The teacher had the monitor_______the papers．

A. to hand out
B. hand out
C. hand down
D. to hand down

[单选题]感受器的适应现象表现在持续刺激条件下（　　）

A. 动作电位发放频率变慢
B. 动作电位幅度变小
C. 动作电位发放频率变慢，幅度变小
D. 动作电位潜伏期延长
E. 动作电位发放频率变快

[单选题]下述各种类型^{(various type)}的烧伤，哪项属于重度烧伤 （　　）

A. Ⅱ°度或Ⅱ°度以上烧伤，面积大于30%以上者
B. Ⅲ°度烧伤，面积大于20%以上者
C. 总烧伤面积为30%～49%，其中Ⅱ。度烧伤占20%以上者
D. Ⅱ°度烧伤，面积大于50%以上者
E. Ⅱ°度烧伤，面积为20%，伴有呼吸道灼伤者

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