问题
选择题
图A 、B 、C 表示的是物质运输的三种方式，以下说法中错误的是
A．图A是自由扩散
B．图B运输速度的限制因素是能量
C．图C是主动运输
D．图C细胞内物质浓度不断升高，说明该物质进行逆浓度运输
答案
答案：B
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图A 、B 、C 表示的是物质运输的三种方式，以下说法中错误的是
A．图A是自由扩散
B．图B运输速度的限制因素是能量
C．图C是主动运输
D．图C细胞内物质浓度不断升高，说明该物质进行逆浓度运输
答案：B
| Geography is the study of the relationship between people and the land. Geographers compare and contrast various places on the earth. But they also (51) beyond the individual places and consider the earth as a whole. The English word geography means "to describe the earth. " (52) geography books focus on a small area like a town or city. Others deal with a state, a region, a nation, or an (53) continent. Many geography books deal with the whole earth. Another (54) to divide the study of geography is to distinguish between physical geography and cultural geography. The former focuses on the natural world; the (55) starts with human beings and studies how human beings and their environment act (56) each other. But when geography is considered as a single subject, (57) branch can neglect the other. A geographer might be described as one who observes, records, and explains the (58) between places. If all places (59) alike, there would be little need for geographers. We know, however, that no two places are exactly the same. Geography, (60) is a point of view, a special way of looking at place. |
A．extensive
B．entire
C．overall
D．enormous