[单项选择] Defective Genes and Human Health Each of us carries about half a dozen defective(有缺点的) genes. We remain blissfully(快乐地) unaware of this fact unless we, or one of our close relatives, are amongst the many millions who suffer from a genetic disease. About one in ten people has, or will develop at some later stage, an inherited(遗传的)genetic disorder, and approximately 2,800 specific conditions are known to be caused by defects (mutations) in just one of the patient’’s genes. Some single gene disorders are quite common-—cystic(胞状的) fibrosis (纤维化) is found in one out of every 2,500 babies born in the Western World—and in total, diseases that can be traced to single gene defects account for about 5% of all admissions to children’’s hospitals. Most of us do not suffer any harmful effects from our defective genes because we carry two copies of nearly all genes, one derived from our mother and the other from our father. The only exceptions to this rule are the g
A. About 10% people have developed an inherited genetic disorder.
B. Diseases of genetic origin account for about 5% of all admissions to hospitals.
C. All the defective genes produce bad effects.
D. Hemophilia is a kind of the X chromosome-linked genetic disease.

热门试题:

[单选题](类别：号段管理难度：中等)故障发生时，故障发现人必须立即上报()( )
A.组长
B.IT服务台
C.总监
D.分管经理

查看答案

[判断题]煤炭企业的安全管理，其目的是在于保证生产安全和煤矿职工的人身安全。( )
A.正确
B.错误

查看答案

[判断题]书面挂失的有效期为6个月。( )
A.正确
B.错误

查看答案

[单选题]常用安全设施视频监控设备视频信息储存时间不得少于( )。( )
A.3天
B.1周
C.1个月
D.3个月

查看答案

[单选题]CRH2型动车组一级检修质量标准中，CRH2A统闸片单个摩擦粒子摩擦材料损伤缺陷面积总和不大于（），且整个闸片摩擦表面摩擦材料面积最少不能低于闸片面积的（）。
A.1cm2,90%
B.1cm2,80%
C.1mm2,80%
D.1mm2,90%

查看答案

[单选题]党领导人民治理国家的基本方略
A.依法治国
B.公平正义
C.执法为民
D.为人民服务

查看答案

[单选题]下列各项，引起意识障碍伴瞳孔缩小的是( )
A.乌头碱中毒
B.吗啡中毒
C.乙醇中毒
D.氰化物中毒
E.颠茄类中毒

查看答案

[单选题]属于护理程序实施阶段的内容是( )
A.分析资料
B.提出护理诊断
C.确定护理目标
D.记录护理活动过程
E.评价病人反应

查看答案

[单项选择]目前常用的3.5英寸软盘片片角上有一带黑滑块的小方口,当小方口被打开时,其作用是______。
A. 只能读不能写
B. 能读又能写
C. 禁止读也禁止写
D. 能写但不能读

查看答案

[多选题]关于细胞膜对离子和小分子物质的跨膜转运，下列说法正确的有( )。
A.钠泵对Na和K的转运属于被动运输
B.O和CO的跨膜转运方式为单纯扩散
C.小肠对葡萄糖和氨基酸的吸收属于协同运输
D.钙通道可逆电化学梯度特异性的转运Na

查看答案

[填空题]Educational attitudes in a country may be a 【B1】 by which its basic cultural values are reflected. To take the American higher education 【B2】 example, university classrooms share certain identical features though they 【B3】 from course to course in some aspects. Any student, 【B4】 their ethnic and social background, is not only allowed but also encouraged to have chances for active participation in class. 【B5】. teachers often expect independent learning 【B6】 their students. It will be most appreciated if a student can 【B7】 the initiative and complete the assignment without too much 【B8】 upon his or her instructors. These two 【B9】 features in American university classrooms actually manifest the basic American values, especially self-reliance and 【B10】 of opportunity.
A. A．vary
B．defer
C．differs
D．diversified

查看答案

[单选题]民用机场道面水泥不宜选用（　　）。
A.矿渣硅酸盐水泥
B.快硬早强型水泥
C.普通硅酸盐水泥
D.火山灰质硅酸盐水泥

查看答案

[单选题]抑制暗点的评估可以将近用worth4dot
A.逐渐原理患者
B.逐渐靠近患者
C.固定位置
D.改变上下左右

查看答案

[单项选择]旅游业内部以食、住、行、游、购、娱为核心的各大行业间的经济技术联系与比例关系，也就是旅游业的部门结构，是（）。
A. 旅游产品结构
B. 旅游产业结构
C. 旅游市场结构
D. 旅游投资结构

查看答案

[单项选择]髋关节后脱位的复位手法不包括（）。
A. Allis法
B. Bigelow法
C. Stimson法
D. 反回旋法
E. 拔伸足蹬法

查看答案

[判断题]客户通过网上支付跨行清算系统办理跨行查询账户信息业务时，需要事先与开户行签订账户信息查询协议。
A.正确
B.错误

查看答案

[单项选择]推切法用来切一些（）而不能一道将原料切断的刀法
A. 无韧性
B. 软性
C. 有韧性
D. 不带骨