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【单选题】
当受到害虫侵袭时，大豆和其他植物会产生一种叫做茉莉酸盐的荷尔蒙，从而启动一系列化学反应，合成更多蛋白酶抑制剂，增强自身的抵抗力。害虫吃下这种化合物以后，其消化功能会受到抑制。植物生物学家德鲁西亚发现高浓度二氧化碳会导致植物丧失分泌茉莉酸盐的能力，整个"防御通道"由此将被关闭，豆类作物的抗虫害能力便随着二氧化碳含量的增多而逐渐减弱。由此可以推出（）。
A.
大豆产量会受到空气状况的影响
B.
茉莉酸盐的主要作用是抵抗害虫
C.
不能产生茉莉酸盐的植物将很难抵御害虫
D.
减少空气中的二氧化碳会增加大豆的抗虫害能力
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陆上丝路贸易
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七下西洋
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【单选题】www.tsinghua.edu.cn在这个完整域名中，主机名是（ ）
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B.
tsinghua.edu.cn
C.
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D.
www
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【单选题】Summer is usually the season when Japanese companies are busy with having new employees.
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B.
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C.
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【多选题】儿童保护评价由()、()和()综合计算而得。
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【单选题】II. Choose the best answer for the following questions. 1. Which of the following is NOT true about the Japanese?
A.
a.The Japanese are the strictest in their social and business behavior.
B.
The Japanese usually bow to greet each other.
C.
The Japanese like to discuss business matters with a drink during the meal.
D.
The Japanese value seniority highly.
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【判断题】Japanese people, despite the territorial crowdedness, usually create their own private space mentally.
A.
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B.
错误
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【单选题】In Japanese family, usually the ___ is decisive, aspiring, and responsible for handling the external affairs.( )
A.
father
B.
mother
C.
grandmother
D.
daughter
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【判断题】“Goodbye” is usually put into “886” in the Chinese pronunciation or “3166” as the Japanese Bye-bye.
A.
正确
B.
错误
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相关题目：
【单选题】诗 句“波斯老贾度流沙,夜听驼铃识路赊(遥远)。采玉河边青石子,收来东国易桑麻”反映 ( )
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【简答题】选词填空 alcohol lonely stressed fever kill choice diet stairs active crowded When he was young, he used to drink_____. The buses are always_____ during the rush hours. The students usually get_____ out a...
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【单选题】www.tsinghua.edu.cn在这个完整域名中，主机名是（ ）
A.
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B.
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C.
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D.
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【单选题】Summer is usually the season when Japanese companies are busy with having new employees.
A.
Y
B.
N
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【多选题】儿童保护评价由()、()和()综合计算而得。
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正面碰撞试验
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【单选题】II. Choose the best answer for the following questions. 1. Which of the following is NOT true about the Japanese?
A.
a.The Japanese are the strictest in their social and business behavior.
B.
The Japanese usually bow to greet each other.
C.
The Japanese like to discuss business matters with a drink during the meal.
D.
The Japanese value seniority highly.
查看完整题目与答案
【判断题】Japanese people, despite the territorial crowdedness, usually create their own private space mentally.
A.
正确
B.
错误
查看完整题目与答案
【单选题】In Japanese family, usually the ___ is decisive, aspiring, and responsible for handling the external affairs.( )
A.
father
B.
mother
C.
grandmother
D.
daughter
查看完整题目与答案
【判断题】“Goodbye” is usually put into “886” in the Chinese pronunciation or “3166” as the Japanese Bye-bye.
A.
正确
B.
错误
查看完整题目与答案
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