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更多“维管束（vascular bundle)”相关的问题
A．Y
B．N
C．NG
Before his death, the farmer gave each of his sons a bundle of sticks.
A．真
B．False
Only one of the seven sons was strong enough to break the bundle of sticks.
A．真
B．False
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Senility refers to great losses of intellectual capacity that occurs in old age and is【C1】______with the wide- spread loss of nerve cells and the【C2】______of brain tissue. Senility is a great decline from a previous intellectual【C3】______in an aging person. Memory is the mental capacity most 6ften affected. The memory loss may first show itself clearly in simple absentmindedness or a(n)【C4】______to forget or【C5】______things and repeal oneself in conversation.【C6】______the senility progresses, the loss of memory【C7】______in scope until the patient can no longer remember basic social and【C8】______skills or【C9】______independently. There may also be declines in the person's language skills, spatial or temporal orientation.【C10】______or other cognitive【C11】______and personality changes may also be【C12】______to see. Senility usually has a slow, gradual onset and is【C13】______common in persons over age 75.
The most common【C14】______of the syndrome is Alzheimer's disease, which【C15】______for about 50 percent of all elderly persons with【C16】______mind and is hard to restore a former state. The second most common cause is vascular senility which arise from hypertension(high blood pressure)or some other vascular condition. In this type, a series of small strokes(中风)progressively destroy small【C17】______of the brain, eventually leading to senility. There is no【C18】______for Alzheimer's disease, but vascular senility can【C19】______be prevented or its【C20】______slowed by treatment of the underlying systemic vascular disorder. Among other significant causes of senility in the elderly are Huntington's chorea, Parkinson's disease, and multiple sclerosis.
【C1】
A．linked
B．tied
C．associated
D．joined
