【名词&注释】
生产关系(production relations)、科技进步(scientific and technological progress)、放线菌(actinomycetes)、细胞壁(cell wall)、主要特征(main features)、营养繁殖(vegetative propagation)、世界领先(world lead)、消化吸收再创新、引进消化吸收(introducing digesting)、打孔器(puncher)
[单选题]放线菌可看作是细菌和真菌间的过渡类型。( )
A. 正确
B. 错误
查看答案&解析
举一反三：
[单选题]--- What' s the matter with Della?--- Well, her parents wouldn't allow her to go to the party, but she still __.
A. hopes to
B. hopes so
C. hopes not
D. hopes for
[单选题]地衣营养繁殖的主要方式是( )。
A. 粉芽
B. 异型胞
C. 出芽生殖
D. 断裂
[单选题]From Paragorph 2, we know that the author was .
A. good a pretending
B. rude to the stockbroker
C. ready to help her mother
D. unwilling to phone for her mother
[单选题]机械组织的主要特征：有二：一是细胞具有加厚的细胞壁；二是细胞排列紧密。( )
A. 正确
B. 错误
[单选题]
A. through
B. across
C. of
D. on
[单选题]CPlants can’t communicate by moving or making sounds, as most animals do. Instead, plants produce volatile compounds, chemicals that easily change from a liquid to a gas. A flower’s sweet smell, for example, comes from volatile compounds that the plant produces to attract insects such as bugs and bees.
A. Plants can also detect volatile compounds produced by other plants. A tree under attack by hungry insects, for instance, may give off volatile compounds that let other trees know about the attack, In response, the other trees may send off chemicals to keep the bugs away- or even chemicals that attract the bugs’ natural enemies.
B. Now scientists have created a quick way to understand what plants are saying: a chemical sensor(传感器) called an electronic nose. The “e-nose” can tell compounds that crop plants make when they’re attacked. Scientists say the e-nose could help quickly detest whether plants are being eaten by insects. But today the only way to detect such insects is to visually inspect individual plants. This is a challenging task for managers of greenhouses, enclosed gardens that can house thousands of plants.
C. The research team worked with an e-nose that recognizes volatile compounds. Inside the device, 13 sensors chemically react with volatile compounds. Based on these interactions, the e-nose gives off electronic signals that the scientists analyze using computer software.
D. To test the nose, the team presented it with healthy leaves from cucumber, pepper and tomato plants, all common greenhouse crops. Then the scientists collected samples of air around damaged leaves from each type of crop. These plants had been damaged by insects, or by scientists who made holes in the leaves with a hole punch (打孔器(puncher)).
E. The e-nose, it turns out, could identify healthy cucumber, pepper and tomato plants based on the volatile compounds they produce. It could also identify tomato leaves that had been damaged. But even more impressive, the device could tell which type of damage – by insects or with a hole punch – had been done to the tomato leaves.
F. With some fine tuning, a device like the e-nose could one day be used in greenhouses to quickly spot harmful bugs, the researchers say. A device like this could also be used to identify fruits that are perfectly ripe and ready to pick and eat, says Natalia Dudareve, a biochemist at Purdue University in West Lafayette, Ind. who studies smells of flowers and plants. Hopefully, scientists believe, the device could bring large benefits to greenhouse managers in the near future.
G. 49. We learn from the text that plants communicate with each other by______.
H. making some sounds B． waving their leaves
I. producing some chemicals D． sending out electronic signals
[单选题]It is reported that many a new house at present in the disater area. ( )
A. are being built
B. were being built
C. was being built
D. is being built
[单选题]2004年以来，中国通过原始创新、集成创新和引进消化吸收(introducing digesting)再创新，取得了一系列重大技术创新成果，形成了具有世界领先(world lead)水品的告诉铁路技术体系。今天，中国已步入高铁时代，并正在成为高铁技术输出国。中国高铁的发展历程表明①创新就是对既往的否定和对现实的肯定
A. ②创新的过程必定是“扬弃”的过程
B. ③创新推动科技进步和社会生产力发展
C. ④创新推动生产关系和人类思维的变革
D. ①②
E. ②③
F. ④①
G. ③④
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