1)A differ from B in /in that A is
2)difference between A and B is…
【Paragraph 1】Control over one's motor behavior ranks among the infant's greatest achievements. Psychologists who study the acquisition of motor skills in children find it useful to distinguish between gross motor development, that is, motor skills which help children to get around in their environment such as crawling and walking, and fine motor development, which refers to smaller movement sequences like reaching and grasping.
1. According to paragraph 1, the distinction between gross motor development and fine motor development is based primarily on
A. how much control the infant has over the motor skills
B. when the motor skills are developed
C. the size of the movement sequences involved
D. the usefulness of the movement sequences involved
题目中问道：gross motor development 和fine motor development的区别在于什么?这道题就属于典型的单纯问两者不同点的题目，因此只需要从文中读到gross motor development 和fine motor development的不同点就可以选出答案了。
Venus and earth are commonly regarded as twin planets but not identical twins. They are about the same size, are composed of roughly the same mix of materials, and may have been comparably endowed at their beginning with carbon dioxide and water. However, the twins evolved differently, largely because of differences in their distance from the Sun. With a significant amount of internal heat, Venus may continue to be geologically active with volcanoes, rifting, and folding. However, it lacks any sign of a hydrologic system (water circulation and distribution): there are no streams, lakes, oceans, or glaciers. Space probes suggest that Venus may have started with as much water as Earth, but it was unable to keep its water in liquid form. Because Venus receives more heat from the Sun, water released from the interior evaporated and rose to the upper atmosphere where the Sun’s ultraviolet rays broke the molecules apart. Much of the freed hydrogen escaped into space, and Venus lost its water. Without water, Venus became less and less like Earth and kept an atmosphere filled with carbon dioxide. The carbon dioxide acts as a blanket, creating an intense greenhouse effect and driving surface temperatures high enough to melt lead and to prohibit the formation of carbonate minerals. Volcanoes continually vented more carbon dioxide into the atmosphere. On Earth, liquid water removes carbon dioxide from the atmosphere and combines it with calcium, from rock weathering, to form carbonate sedimentary rocks. Without liquid water to remove carbon from the atmosphere, the level of carbon dioxide in the atmosphere of Venus remains high.
5. According to paragraph 2, what is one difference between Earth and Venus?
A. Earth has less water in its atmosphere than Venus does.
B. Earth has a hydrologic system, but Venus does not.
C. Earth is less geologically active than Venus is.
D. Earth has more carbon dioxide than Venus does.