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【单选题】
转基因作物目前在世界上已种植有lo00万公顷左右，种植最多的是棉花、玉米和西红柿等。在实验室试种的还有莴苣、西瓜、稻谷等品种。试验的目的除了增产之外，还在于提高这些品种的抗病毒能力。但同时也有专家担心转基因作物可能对环境有危险。比如在美国栽种的那种能抗虫害的玉米和棉花，可能加快一些更难对付的害虫的出现。这类作物的所有分子都分泌出一些微量的“杀虫药”，尤其是那些能抗除莠剂的作物，它们一旦同野生状态下的“表姐妹”杂交之后，那些“表姐妹”也就会因此而成为除莠剂无法除掉的变种了。 下列说法与原文意思相符的一项是（ ）。
A.
转基因作物的研究已取得实质性进展，目前很多品种都得到推广种植
B.
提高作物抗病毒的能力仍然是转基因作物技术研究没有完全解决的问题
C.
更难对付的害虫的出现将是转基因作物给环境带来的最大危险
D.
增产并不是转基因技术研究的主要目的，提高抗病毒能力是研究者最感兴趣的
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【单选题】The purpose of Tom Staffords saying 'Tetris is the granddaddy of puzzle game' is______.
A.
to imply that Teris is out of date and lost popularity
B.
to represent a specific group of attracting puzzle games
C.
to suggest that Teris is the inspiration of new games
D.
to declare that there are different types of Tetris
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【单选题】The main purpose of this text is to______.
A.
tell students of important schedule changes
B.
tell students of new bus and library services
C.
show the excellent services for students
D.
ask students to renew their library cards
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【单选题】What was the real purpose of the ruler's invitation?
A.
To declare, new ways of collecting tax.
B.
To entertain those who had made great contributions to the government.
C.
To collect money from the persons invited.
D.
To reward outstanding tax collectors.
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【单选题】在体温单哪个相应时间栏内可记录出入院时间
A.
35℃以下
B.
35～37℃
C.
37～39℃
D.
40～42℃
E.
42℃以上
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【单选题】下列语句执行后的输出是( )。 if 2: print(5) else: print(6)
A.
0
B.
2
C.
6
D.
5
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【判断题】计划要尽可能详细，不要留有余地。
A.
正确
B.
错误
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【单选题】The purpose of this passage is to tell readers ______.
A.
how to help the hard of hearing
B.
that people who lose their hearing have to learn new ways of communicating
C.
that a deaf person has to lip-read even when using a hearing aid
D.
that people who lose their hearing have to learn new ways of communicating
查看完整题目与答案
【简答题】Although for the purpose of this article English literature is treated as being confined to writings in English by natives or inhabitants of the British Isles, it is to a certain extent the case that ...
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【单选题】下列语句执行后的输出是( )。 if 2: print(5) else: print(6)
A.
0
B.
2
C.
5
D.
6
查看完整题目与答案
【判断题】砂过细，则砂的总表面积大，需要水泥浆较多，因而消耗水泥量大。
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【单选题】The purpose of Tom Staffords saying 'Tetris is the granddaddy of puzzle game' is______.
A.
to imply that Teris is out of date and lost popularity
B.
to represent a specific group of attracting puzzle games
C.
to suggest that Teris is the inspiration of new games
D.
to declare that there are different types of Tetris
查看完整题目与答案
【单选题】The main purpose of this text is to______.
A.
tell students of important schedule changes
B.
tell students of new bus and library services
C.
show the excellent services for students
D.
ask students to renew their library cards
查看完整题目与答案
【单选题】What was the real purpose of the ruler's invitation?
A.
To declare, new ways of collecting tax.
B.
To entertain those who had made great contributions to the government.
C.
To collect money from the persons invited.
D.
To reward outstanding tax collectors.
查看完整题目与答案
【单选题】在体温单哪个相应时间栏内可记录出入院时间
A.
35℃以下
B.
35～37℃
C.
37～39℃
D.
40～42℃
E.
42℃以上
查看完整题目与答案
【单选题】下列语句执行后的输出是( )。 if 2: print(5) else: print(6)
A.
0
B.
2
C.
6
D.
5
查看完整题目与答案
【判断题】计划要尽可能详细，不要留有余地。
A.
正确
B.
错误
查看完整题目与答案
【单选题】The purpose of this passage is to tell readers ______.
A.
how to help the hard of hearing
B.
that people who lose their hearing have to learn new ways of communicating
C.
that a deaf person has to lip-read even when using a hearing aid
D.
that people who lose their hearing have to learn new ways of communicating
查看完整题目与答案
【简答题】Although for the purpose of this article English literature is treated as being confined to writings in English by natives or inhabitants of the British Isles, it is to a certain extent the case that ...
查看完整题目与答案
【单选题】下列语句执行后的输出是( )。 if 2: print(5) else: print(6)
A.
0
B.
2
C.
5
D.
6
查看完整题目与答案
【判断题】砂过细，则砂的总表面积大，需要水泥浆较多，因而消耗水泥量大。
A.
正确
B.
错误
查看完整题目与答案
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