Most plants can make their own food from sunlight, (1) some have discovered that stealing is an easier way to live. Thousands of plant species get by (2) photosynthesizing, and over 400 of these species seem to live by pilfering sugars from an underground (3) of fungi(真菌). But in (4) a handful of these plants has this modus operandi been traced to a relatively obscure fungus. To find out how (5) are (6) , mycologist Martin Bidartondo of the University of California at Berkeley and his team looked in their roots. What they found were (7) of a common type of fungus, so (8) that it is found in nearly 70 percent of all plants. The presence of this common fungus in these plants not only (9) at how they survive, says Bidartondo, but also suggests that many ordinary plants might prosper from a little looting, too.

Plants have (10) relations to get what they need to survive. Normal, (11) plants can make their own carbohydrates through photosynthesis, but they still need minerals. Most plants have (12) a symbiotic relationship with a (13) network of what are called my corrhizal fungi, which lies beneath the forest (14) . The fungi help green plants absorb minerals through their roots, and (15) , the plants normally (16) the fungi with sugars, or carbon with a number of plants sharing the same fungal web, it was perhaps (17) that a few cheaters—dubbed epiparasites—would evolve to beat the system. (18) , these plants reversed the flow of carbon, (19) it into their roots from the fungi (20) releasing it as "payment.\

9（）

A.shows

B.denotes

C.indicates

D.hints

求助者一般资料：雯雯，女孩，15岁，初三学生。案例介绍：三个月前在学校操场上与一男老师撞到一起，男老师用一种微妙的眼神看她。当时自己就觉得脸火辣辣的烫，心跳也加快了。以后，只要见到异性就心慌，紧张，上课也无法集中注意力，无心上课。再后来发展到不敢与邻居、老师、同学对视。求助者心里很清楚没有什么可以害怕的，但是自己却无法控制自己的情绪。而且现在基本不参加集体活动，与任何人都很疏远，觉得谁都不能理解、信任和帮助自己。现在感到自卑、孤独、情绪低落、不稳定。学习成绩下滑很多，已经无法去上学了。在家里正常，就是很少说话。心理咨询师观察了解到的情况：求助者自小就胆小，家里有客人的时候自己就呆在自己的屋子里，吃饭也不上桌。朋友较少，很少与人来往。学习优秀。求助者衣着得体，懂礼貌，表情不自然，情绪低落，不敢与心理咨询师目光接触。

可以测验出求助者心理问题诱因的选项有（）。

A.SCL-90

B.CRT

C.MMPI

D.LES