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【单选题】
A 26-year-old male medical student who has no neurological or psychiatric problems undergoes genetic testing to determine if he has a mutation in his Huntington Disease (HD) gene. Several of his maternal relatives, including his mother, have well documented HD. His test results are: HD allele 1: 17 repeats HD allele 2: 43 repeats The most accurate interpretation of this test isA.
He is an asymptomatic individual who inherited an HD gene mutation and will develop symptoms of the disease if he lives long enough
B.
He has HD and should seriously consider another occupation as he will never be able to practice medicine competently
C.
These test results are inconclusive and therefore his 50/50 risk of inheriting the disease from his mother has not been modified by the test.
D.
He has inherited one HD gene mutation, but given that he currently has no symptoms by the age of 26, it is most likely that he will never develop the disease.
E.
Luckily, he has one normal allele. Therefore he is only a gene carrier and will never develop the disease
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【单选题】小明在研究性学习中,搜集了如下历史资料11992年,南斯拉夫联盟共和国成立 21999年美国轰炸南联盟 31992年,欧共体各国在荷兰签订欧洲联盟条约 42005年日本120名驻世界各国大使在外务省召开会议,商讨日本“入常”对策。从小明搜集的资料看,小明研究的主题应是冷战后
A.
美国霸权主义的具体表现
B.
世界政治格局的特点
C.
日本外交政策的发展演变
D.
宗教矛盾与国家冲突
【单选题】偏压构件的抗弯承载力( )。
A.
随着轴向力的增加而增加；
B.
随着轴向力的减少而增加；
C.
小偏压时随着轴向力的增加而增加；
D.
大偏压时随着轴向力的增加而增加。