更多“唐氏综合征是人类最常见的可致患儿中度至重度智力障碍的染色体异”相关的问题
曲线a、b表示物质跨膜运输的两种方式，下列分析正确的是（）。https://assets.asklib.com/psource/2016022716280688660.jpg
A . CO通过方式a运输
B . 葡萄糖通过方式a进入红细胞
C . 低温只会影响方式b的运输
D . 方式b表示物质顺浓度梯度的运输
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Passage 4 In her 26 years of teaching English, Shannon McGuire has seen countless misplaced commas, misspelled words and sentence fragments. But the instructor at US’s Louisiana State University in Baton Rouge said her job is getting harder every day. "I kid you not, the number of errors that I’ve seen in the past few years have multiplied five times," she said. Experts say email and instant messaging are at least partly to blame for an increasing indifference toward the rules of grammar, spelling and sentence structure. They say the problem is most noticeable in college students and recently graduates. "They used to at least feel guilty (about mistakes)," said Naomi Baron, professor of linguistics at American University in Washington, D. C. "They didn’t necessarily write a little better, but at least they felt guilty." Ironically, Baron’s latest book, "Alphabet to Email: How Written English Evolved and Where It’s Heading," became a victim of sloppy proofreading. The book’s title is capitalized differently on the cover, spine and title page. "People used to lose their jobs over this," she said. "And now they just say ’whatever’." "Whatever" describes Jeanette Henderson’s attitude toward writing. The sophomore at the University of Louisiana at Monroe admits that her reliance on spellcheck has hurt her grades in English class. "Computer has spoiled us," she said. But the family and consumer sciences major believes her future bosses won’t mind the mistakes as much as her professor does. "They’re not going to check semicolons, commas and stuff like that," Henderson said. LSU’s McGuire said she teaches her students to use distinct writing styles that fit their purpose. She emphasizes that there’s the informal language of an email to a friend, but there’s also the well thought out and structured academic or professional style of writing. It’s not just email and instant messaging that are contributing to slack writing habits. Society as a whole is becoming more informal. Casual wear at work used to be reserved for Friday, for example, but is now commonplace at most offices. There’s also a greater emphasis on youth culture, and youth tend to use instant messaging more than adults do. English language has been neglected at different points in history but always rebounds. During Shakespearen times, for example, spelling wasn’t considered important, and early publishers rarely proofread. There will likely be a social force that recognizes the need for clear writing and swings the pendulum back.
A．More and more students ask her to teach how to write instant messages.
B．More and more structural errors are seen in her students’ writings.
C．Students are becoming increasingly indifferent to learning English.
D．Parents are more demanding as to the teaching content of the school.
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储备的盈利性是指储备的资产给持有者带来的（）等收益的属性。
A.红利 B.利润 C.利息 D.债息 E.股息
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Cisco PIX525防火墙用于实现内部和外部地址固定映射的配置命令是（）
A．static
B．nat
C．global
D．fixup
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下列哪项不属于高危儿
A．手术产儿
B．出生体重＜2500g
C．孕龄＜37周或≥42周
D．妊高征产妇的新生儿
E．生后1分钟内Apgar评分为5分
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I failed to pass the exam although I had worked very hard. I should ________ the causes of my failure.
A. analysis B. analyze C. analyzer D. analytic
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110kV~220kV中性点直接接地电力网中，对中性点不装设放电间隙的分级绝缘变压器，其零序电流电压保护在故障时应首先切除（）。
A.母联断路器
B.中性点接地变压器
C.中性点不接地变压器
D.所有变压器
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执行如图所示的代码，屏幕上显示的结果为（）。
执行如图所示的代码，屏幕上显示的结果为（）。
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被评价机构的评级可以下调一级的重大责任事故包括（）。
A . 因安全防范措施不当，发生金融诈骗、盗窃、抢劫、爆炸等案件，造成重大影响或损失
B . 因经营管理不善发生挤提事件
C . 业务系统故障，造成重大影响或损失
D . 经查实的重大信访事件
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下列关于期货合约特征的表述，错误的是()。A.合约的履行由期货交易所或结算公司提供担保B.期货合约
下列关于期货合约特征的表述，错误的是()。 A.合约的履行由期货交易所或结算公司提供担保 B.期货合约在商品品种、质量、数量、交货时间和地点等方面事先确定好标准条款 C.期货合约只有很少一部分进行实物交割，绝大多数合约都会在交割期之前平仓 D.期货合约赋予了持有人按约定买人或卖出标的资产的权力
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火管锅炉牵条腐蚀变细超过原来直径的（）时应换新。
A．10％
B．20％
C．30％
D．40％
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“我知道他昨天没来上课”是主谓短语做宾语的句子。
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直肠、肛管的动脉供应包括（）
A. 直肠上动脉B. 直肠下动脉C. 肛管动脉D. 骶中动脉E. 以上都是
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女性生殖器中最常见的肿瘤是
A．卵巢腺瘤
B．卵巢囊腺瘤
C．卵巢纤维瘤
D．子宫肌瘤
E．子宫腺肌瘤
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施工现场出入口的设置应满足消防车通行的要求，并宜布置在不同方向，其数量不宜少于2个。
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