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问题 单项选择题

对于原因不明的惊厥、抽搐患者，诊断毒鼠强中毒时，关于哪项鉴别诊断是错误的（）

A.脑部疾病所致继发性癫痫

B.破伤风、狂犬病惊厥等疾病

C.主要需与氟乙酰胺中毒鉴别

D.病毒性脑炎

E.不需要与精神分裂症、酒精性戒断综合征相鉴别

答案

参考答案：E

单项选择题 A1/A2型题

有关龋病牙菌斑微生物学，以下哪项不正确（）

A.血链球菌是最早在牙面定居的细菌之一，人类患龋者口腔中血链球菌的检出率增高

B.变形链球菌的致龋性主要取决于其产酸性和耐酸性

C.牙菌斑的产酸活性与龋病发病密切相关

D.产碱细菌能减轻牙菌斑中酸的有害影响

E.所有放线菌均能发酵葡萄糖产酸
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单项选择题

"A rolling stone gathers no moss(苔藓) ," but there is one living animal that does gather moss, the three-toed sloth (树獭) of South America. This slowest-moving member of the animal kingdom is so inactive that moss actually gathers on its body and turns it green——strange as it seems!
Most of the sloth’s life is spent motionless, hanging upside down from a limb. And that is the way its hair grows. Long and coarse, the strands (串) from receptacles (花托) for the damp jungle algae (水藻) that turn the brown fur a mossy green. Actually this moss helps the animal survive because it serves as a perfect camouflage against the leaf trees and hides the sloth from the jungle’s swift - moving hunters. The sloth would have little chance of survival on the ground. With long, curved claws hooked over the limb of a leafy tree, it spends the long hot hours during the day drowsing and eating. Inch by inch, it strips the leafy limbs bare and crawls slowly down the trunk to find a new dining spot, but only at night.
In addition to looking rather like a vegetable, the sloth is a strict vegetarian. Running out of its favorite leaf is about the only thing that will make a sloth move. Then its appetite may even force the animal into swimming a stream to reach a juicy succulent(多汁的植物). It will also force it into fighting to keep the tree all to itself. The sloth is lazy and prefers to be alone, but it will tolerate its own relatives!

According to the passage, the sloth will move about when ______.

A．it senses a coming danger

B．it is forced to swim on a hot day

C．it is short of its favorite food

D．it wants to keep itself to itself
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