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【简答题】
根据句意及所给提示完成单词。 1. The ______ (运输) of goods by plane (飞机) is very expensive. 2. She can ______ (几乎不) walk any longer. 3. He can't go to school because of his ______ (病). 4. What's the matter w______ her? 5. Do you want to go f______ this weekend? 6. The ______ (旅客) are going to visit the Great Wall. 7. She wants to be an actress when she g______ up. 8. During the summer v______, my family will go to Qingdao for sightseeing. 9. We should keep the ______ (平衡) of nature. 10. There's no ______ (不同) between the two boys.
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【简答题】Text 4Timothy Berners-Lee might be giving Bill Gates a run for the money, but he passed up his shot at fabulous wealth—intentionally—in 1990. That’s when he decided not to patent the technology used t...
【单选题】Timothy Berners-Lee, might be giving Bill Gates a run for the money, but he passed up his shot at fabulous wealth—intentionally—in 1990. That's when he decided not to patent the technology used to cre...
A.
created the most important innovation in the 1990s.
B.
accumulated as much personal wealth as Bill Gates.
C.
patented the technology of Microsoft software
D.
given his brainchild to us all.
【单选题】儿童学习口语的关键期( )
A.
1--2岁
B.
2--3岁
C.
3--4岁
D.
4--5岁
【单选题】薄层色谱法测糖精钠时,含糖精钠样品经前处理后展开、显色,样斑呈(),背景为蓝色。
A.
红色
B.
黑色
C.
黄色
D.
紫色
【单选题】儿童学习口头语言的关键期( )
A.
0--1岁
B.
1-3岁
C.
3-6岁
D.
5-6岁
【简答题】辐射度量与光度量的根本区别是什么?为什么量子流速率的计算公式中不 能出现光度量?
【单选题】儿童学习口语的关键期是()
A.
2~3岁
B.
3~4岁
C.
4~5岁
D.
5~6岁
【判断题】在杂草较多,整地不良的地里应选用具有锐角入土角的锄铲式开沟器,因为它不易堵草,通过性好。 ( )
A.
正确
B.
错误
【单选题】薄层色谱法测糖精钠时,含糖精钠样品经前处理后展开、显色,样斑成(),背景为蓝色。
A.
红色
B.
黑色
C.
黄色
D.
紫色
【多选题】五大类植物病原物各是采用什么手段危害植物的
A.
病毒本身无独立的代谢系统,而是直接以核酸影响和诱导寄主原生质代谢作用发生改变,从而诱发寄主原有物质数量的增减和新物质的产生。
B.
真菌和细菌分泌酶和毒素分解细胞物质和改变膜透性,造成细胞破损死亡,其分泌物和代谢物改变植物体内激素平衡
C.
线虫直接刺吸寄主,其分泌物和代谢物分解和毒害寄主细胞和组织、 改变寄主细胞功能成为代谢库
D.
寄生性种子植物是截断寄主本身的生活物质的供应为自己的供应系统,寄主营养不良
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