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阅读理解。 Laptop computers are popular all over the world. People use them on trains and airplanes, in airports and hotels. These laptops connect people to their workplace. In the United States today, laptops also connect students to their classrooms. Westlake College in Virginia will start a laptop computer program that allows students to do schoolwork anywhere they want. Within five years, each of the 1500 students at the college will receive a laptop. The laptops are part of a $10 million computer program at Westlake, a 110-year-old college. The students with laptops will also have access to the Internet. In addition, they will be able to use e-mail to 'speak' with their teachers, their classmates, and their families. However, the most important part of the laptop program is that students will be able to use computers without going to computer labs. They can work with it at home, in a fast-food restaurant or under the trees-anywhere at all! Because of the many changes in computer technology, laptop use in higher education, such as colleges and universities, is workable. As laptops become more powerful, they become more similar to desktop computers. In addition, the portable computers can connect students to not only the Internet, but also libraries and other resources. State higher-education officials are studying how laptops can help students. State officials are also testing laptop programs at other universities, too. At Westlake College, more than 60 percent of the staff use computers. The laptops will allow all teachers to use computers in their lessons. As one Westlake teacher said, 'Here we are in the middle of Virginia and we're giving students a window on the world.They can see everything and do everything.' 1. The main purpose of the laptop program is to give each student a laptop to _____. A. use for their schoolwork B. access the Internet C. work at home D. connect them to libraries 2. Why is the word 'speak' in the second paragraph in quotation marks (引号)? A. They don't really talk. B. They use the computer language. C. Laptops have speakers. D. None of the above reasons is correct. 3. Which of the following is true about Westlake College? A. All teachers use computers. B. 1500 students have laptops. C. It is an old college in America. D. Students there can do everything. 4. A window on the world in the last paragraph means that students can _____. A. attend lectures on information technology B. travel around the world C. get information from around the world D. have free laptops 5. What can we infer (推断)from the passage? A. The program is successful B. The program is not workable. C. The program is too expensive. D. We don't know the result yet.
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举一反三
【单选题】小儿腹泻发病率高的年龄组是
A.
<3月
B.
3~5月
C.
6月~2岁
D.
3~4岁
E.
5~6岁
【单选题】小儿腹泻发病率高的年龄组是
A.
<3个月
B.
3~5个月
C.
6个月~2岁
D.
3~4岁
E.
5~6岁
【单选题】现有甲、乙两种植物(均为二倍体纯种),其中甲种植物的光合作用能力高于乙种植物,但乙种植物很适宜在盐碱地种植。且相关性状均为核基因控制。要利用甲、乙两种植物的优势,培育出高产、耐盐的植株,有多种生物技术手段可以利用。下列所采用的技术手段中,不可行的是( )。
A.
利用植物体细胞杂交技术,可获得满足要求的四倍体杂种目的植株
B.
将乙种植物耐盐基因导入到甲种植物的受精卵中,可培育出目的植株
C.
两植物杂交后,得到的F1再利用单倍体育种技术,可较快获得纯种的目的植株
D.
诱导两植物花粉融合,并培育成幼苗,用秋水仙素处理,可培育出目的植株
【单选题】医学统计学的基本内容包括( )
A.
选择对象、计算统计指标、参数估计和假设检验
B.
统计设计、数据收集与整理、统计描述和统计推断
C.
搜集资料、整理资料和分析资料
D.
搜集资料、计算均数、标准差、标准误
E.
参数估计和假设检验
【单选题】现有甲、乙两种植株 ( 均为二倍体纯种 ) ,其中甲种植株的光合作用能力高于乙种植株,但乙种植株很适合在盐碱地种植。要利用甲、乙两种植株各自的优势,培育出高产、耐盐的植株,有多种生物技术手段可以利用。下列采用的技术手段不可行的是 ( )
A.
利用植物细胞融合技术,可获得满足要求的四倍体杂种目的植株
B.
将乙种植株耐盐基因导入甲种植株的受精卵中,可培育出目的植株
C.
两种植株杂交后得到 F 1 ,取其花粉,进行花药离体培养获得目的植株
D.
诱导两种植株的花粉融合并培育成幼苗,幼苗用秋水仙素处理,可培育出目的植株
【单选题】现有甲、乙两个物种的植株若干(均为二倍体纯种),其中甲种植株的光合作用能力高于乙种植株,但乙种植株很适宜在盐碱地种植。要利用甲、乙两种植株各自优势,培育出高产、耐盐的植株,有多种生物技术手段可以利用。下列所采用的技术手段中不可行的是()
A.
利用植物体细胞杂交技术,可获得满足要求的四倍体杂种植株
B.
将乙种植株耐盐基因导入到甲种植株的受精卵中,可培育出目的植株
C.
两种植株杂交后,得到的F1再利用单倍体育种技术可较快获得纯种的目的植株
D.
诱导两种植株的花粉细胞融合并培育成幼苗,幼苗用秋水仙素处理,可培育出目的植株
【多选题】医学统计学的基本内容主要包括:
A.
专业设计
B.
统计设计
C.
数据整理和核查
D.
统计描述
E.
统计推断
【单选题】利用秋水仙素诱导产生多倍体,秋水仙素作用于细胞周期的( )
A.
间期
B.
前期
C.
中期
D.
后期
【单选题】现有甲、乙两种植物(均为二倍体纯种),其中甲种植物的光合作用能力高于乙种植物,但乙种植物很适宜在盐碱地种植,且相关性状均为核基因控制。要利用甲、乙两种植物的优势,培育出高产、耐盐的植株,有多种生物技术手段可以利用。下列所采用的技术手段中,不可行的是()
A.
利用植物体细胞杂交技术,可获得满足要求的四倍体杂种目的植株
B.
将乙种植物耐盐基因导入到甲种植物的受精卵中,可培育出目的植株
C.
两种植物杂交后,得到的F1再利用单倍体育种技术,可较快获得纯种的目的植株
D.
诱导两种植物的花粉融合,并培育成幼苗,幼苗用秋水仙素处理,可培育出目的植株
【简答题】实施采购流程时应该注意的有哪些问题?
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