青藏高原自东向西横跨9个自然地带。高原特有的三维地带性分异特点，使广阔高原边缘的深切谷地发育了（）森林生态系-找考题网

单项选择题Read the following paragraphs and identify the sentence that is not appropriate in each of the paragraphs. Japanese society is facing its most serious population threat in recent years. (1)Japan’s birthrate keeps falling steadily. (2)Japanese women find it harder to hunt for a satisfactory job. (3)If this continues, the population will get smaller and smaller. (4)While the number of babies is decreasing, the average Japanese life span is increasing. It is one of the longest in the world. This is a national catastrophe because there are fewer working-age people who pay into the social security system, and there will eventually be too few workers. A、句（1） B、句（2） C、句（3） D、句（4）

青藏高原自东向西横跨9个自然地带。高原特有的三维地带性分异特点，使广阔高原边缘的深切谷地发育了（ ）森林生态系统类型。 A. 热带季雨林 B. 山地常绿阔叶林 C. 针阔叶混交林 D. 山地暗针叶林

青藏高原自东向西横跨9个自然地带。高原特有的三维地带性分异特点，使广阔高原边缘的深切谷地发育了（）森林生态系统类型。 A. 热带季雨林 B. 山地常绿阔叶林 C. 针阔叶混交林 D. 山地暗针叶林