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问题 单项选择题

［此病例属于 57－58题]　　病人男，45岁，因在工地干活时，被生铁钉刺人足跟而致破伤风，收住入院。

对此病人应实施何种隔离措施

A．接触性隔离

B．消化性隔离

C．昆虫隔离

D．保护性隔离

E．严密隔离

答案

参考答案：A

单项选择题

以下哪一异常是鼻道窦口复合体的解剖异常：

A．钩突气房

B．下鼻甲肥大

C．鼻中隔偏曲

D．后鼻孔闭锁

E．终末隐窝
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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.\

11（）

A.green

B.land

C.wild

D.grown
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