断层是指岩体受力断裂后，断裂层两侧的岩块发生了显著位移。如按断块之间的相对错动的方向

计算log₂3•log₃4•log₄5•…•log₁₀₂₃1024的结果为（　　）

A．8

B．9

C．10

D．11

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．biology

B．botany

C．chemistry

D．mathematics

简述结婚的实质条件。

釉质和牙本质相交的釉牙本质界是

A．一条直线分隔釉质和牙本质

B．一条形状不规则的曲线

C．一条凹面向着牙本质的弧线

D．若干短弧线凹面突向牙本质

E．若干短弧线凹面突向牙釉质

春秋战国时代，小农经济出现的最主要的条件是______

A．各国变法承认土地私有
B．牛耕逐渐普及开来
C．铁制农具出现并逐步推广
D．家庭观念越来越强