19世纪自然科学的三大发现是细胞学说、（）和（）。

下列没有语病的一句是（）。

A．读了这篇文章，能够使广大读者更加深刻地认识到没有制约的权力必然产生腐败这一道理。

B．这本书，精装本和普及本的价格悬殊一半多。

C．古典芭蕾舞体系能够最大限度地体现舞蹈动作的技巧性、表现力和协调性，培养演员的体力和悟性。

D．某厂擅自使用天津厂的牡丹牌商标，推销自己的产品，是违反商标法的行为，因为侵犯了商标专用权。

Part 4

Questions 26-45

·Read the following passage and decide which answer best fits each space.
·Forquestions26-45, markoneletterA, B, C or D on the Answer Sheet.
Both (26) and zoology are parts of a more general field of science, biology. The two are studies of (27) things, which share certain characteristics, (28) they are plants or animals. Botany deals with plants, whose organisms that can (29) their own food by the use of sunlight. Zoology on (30) hand, deals with animals, those organisms that cannot manufacture their own food and are thus dependent (31) plants for their food.
(32) plants and animals share many abilities, the extent (33) which plants can exercise some of those abilities is (34) . For example, both plants and animals need food, water, and warmth for growth, (35) plants can move to (36) those needs only by the slow extraction of their leaves and roots, while animals can move relatively (37) distances in relatively little time. When an animal is hurt with needle, the animal will (38) the part of the body (39) . This ability to draw back (40) pain or irritation, called irritability, is found only to a very limited extent in plants.
If plants (41) the same (42) as animals, animals would have had a more difficult time finding food. If animals were as limited as plants, they might (43) a means of manufacturing their own food, as plants do now. The world would be a very different place (44) it is if the characteristics of plants and animals were (45)

A．livable

B．alive

C．living

D．lively

脂酰基从胞液进入线粒体需要下列哪些物质及酶参与？（）。

A.肉碱

B.柠檬酸

C.肉碱脂酰转移酶Ⅰ

D.肉碱脂酰转移酶Ⅱ

焦炉煤气的硫主要有（）、（）、（）、（）、（）、（）。

心脏电激动的基础就是心肌细胞的（）。当细胞的跨膜电位迅速消失时便称为心肌细胞的（），而后发生的细胞复极化状态的过程称为（）。