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【单选题】
Learning disabilities are very common. They 【21】______ perhaps 10 percent of all children. Scientists now know there are many different kinds of learning disabilities and that they are 【22】______ by many different things. There is no longer any 【23】______ that all learning disabilities 【24】______ differences in the way the brain is organized. Since there is no 【25】______ sign of the disorder, some researchers began looking at the brain itself to learn what might be wrong. In one study, researchers 【26】______ the brain of a learning-disabled person. They found two unusual things. One 【27】______ cells in the left side of the brain, which control language. These cells 【28】______ are white, in the learning disabled person, 【29】______ , these cells were gray. The researchers also found that many of the nerve cells were not in a line the 【30】______ they should have been. The nerve cells were mixed together. The study was carded out 【31】______ the guidance of Norman Geschwind, an expert on learning disabilities. Doctor Geschwind 【32】______ that learning disabilities resulted mainly from problems in the left side of the brain, and this part of brain failed to develop normally. Probably, he said, nerve cells there did not connect 【33】______ they should. So the brain was like an electrical device in which the wires were 【34】______ . Other researchers did not examine brain 【35】______ Instead, they measured the brain's electrical activity and made a map of the electrical 【36】______ . Frank Duffy experimented with this 【37】______ and found large differences in the brain activity of normal children and those with reading problems. The differences appeared 【38】______ the brain. Doctor Duffy said his research is 【39】______ that reading disabilities involve 【40】______ to a wide area of the brain, not just the left side. 【21】
A.
influence
B.
effect
C.
affect
D.
shape
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【单选题】— Liu Fang, I didn't know you can play the Pipa and Guzheng so well. — Well, actually I ________ it since I was six years old. [     ]
A.
plays
B.
have been playing
C.
played
D.
had been playing
【单选题】( 2011年)某商场采用毛利率法计算期末存货成本。甲类商品2010年4月1日期初成本为3 500万元,当月购货成本为500万元,当月销售收入为4 500万元。甲类商品第一季度实际毛利率为25%。2010年4月30日,甲类商品结存成本为( )万元。
A.
500
B.
1 125
C.
625
D.
3 375
【单选题】材料在拉断前所承受的最大应力称为 。
A.
屈服强度
B.
抗拉强度
C.
伸长率
D.
冲击韧度
【单选题】(2011年考试真题)某商场采用毛利率法计算期末存货成本。甲类商品2010年4月1日期初成本为3 500万元,当月购货成本为500万元,当月销售收入为4 500万元。甲类商品第一季度实际毛利率为25%。2010年4月30日 ,甲类商品结存成本为( )万元。
A.
50
B.
1 125
C.
625
D.
3 375
【单选题】通常所说的32位微处理器是指:
A.
地址总线的宽度为32位
B.
处理器数据长度只能为32位
C.
CPU字长为32位
D.
通用寄存器数目为32位
【单选题】甲商场采用毛利率法计算期末存货成本。某商品2011年7月1日结存成本为500万元,7月购货成本为600万元,8月购货成本为500万元,9月购货成本为800万元。第三季度销售净额共计3000万元,该产品第二季度实际毛利率为30%。2011年9月30日,该商品结存成本为( )万元。
A.
300
B.
1000
C.
800
D.
500
【单选题】某商场采用毛利率法计算期末存货成本。A类商品2011年4月1日期初成本为4000万元,当月购货成本为3000万元,当月销售收入为6000万元。A类商品第二季度实际毛利率为30%。2011年7月31日,A类商品结存成本为( )万元。
A.
1000
B.
700
C.
2800
D.
17000
【单选题】通常所说的 32 位微处理器是指( )
A.
地址总线的宽度为 32 位
B.
处理的数据长度只能是 32 位
C.
CPU 字长为 32 位
D.
通用寄存器数目为 32 个
【单选题】通常所说的 32 位微处理器是指 。
A.
地址总线的宽度为 32 位
B.
处理器数据长度只能为 32 位
C.
CPU 字长为 32 位
D.
通用寄存器数目为 32 个
【单选题】屈肘关节的主要肌是
A.
肱二头肌
B.
肱三头肌
C.
肱肌
D.
喙肱肌
E.
胸大肌
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