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问题 判断题

证券投资基金通过发行基金单位，集中投资者的资金，由基金托管人管理和运用资金。( )

答案

参考答案：错

解析： 证券投资基金通过发行基金单位，集中投资者的资金，由基金管理人管理和运用资金，基金托管人负责保管基金。

单项选择题

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
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单项选择题

产毒性霍乱弧菌在肠道内定居繁殖引起疾病，并刺激机体产生免疫反应，诱发的保护性抗体主要为（）

A.IgG

B.IgE

C.IgM

D.SIgA

E.IgG和IgM
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