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利用温室种植,可以使其在冬、春季节上市获取较高经济效益。科研人员探究温室内不同CO 2 浓度对番茄光合速率和产量的影响,结果如下表。请回答问题: 组别 净光合速率( μmol/(m 2 . s) ) 产量( kg/hm 2 ) A 0 (对照组,大气 CO 2 浓度) 24.50 70407.69 A 1 ( 600 μmol/L CO 2 浓度) 29.87 82682.69 A 2 ( 800 μmol/L CO 2 浓度) 36.24 90148.08 A 3 ( 1000 μmol/L CO 2 浓度) 37.28 97844.23 (1)随着温室CO 2 浓度的升高,进入叶绿体的CO 2 增多,与C 5 结合生成的____增加。CO 2 浓度升高还能提高Rubisco(催化CO 2 固定的酶)的活性,直接提高____反应的速率,从而提高了光合速率和产量。 (2)科研人员进一步研究了温室内不同CO 2 浓度对番茄光合色素含量的影响,结果如图1。 图1 由图1可知,随着温室CO 2 浓度的升高,分布在叶绿体____上的光合色素含量增加,吸收____增多,促进光反应产生更多____,最终提高了光合速率和产量。 (3)科研人员继续进行实验探索更合理的温室增施CO 2 方法,应用于实际生产。 实验组1:高浓度短时间增施,每日6:00~9:00增施浓度为800~1000 μmol/mol CO 2 ;实验组2:低浓度长时间增施,每日6:00~16:00增施浓度为400~600 μmol/mol CO 2 ;对照组:不增施CO 2 。 检测各组不同器官中干物质的量,结果如图2。请根据结果选择更为合理的方法并阐述理由:____。 图2
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参考答案：
举一反三
【单选题】When the applause ______, Obama continued his speech.
A.
died off
B.
died down
C.
died out
D.
died of
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【判断题】“规划”、“部署”、“安排”、“打算”、“方案”、“工作纲要”、“工作意见”、“要点”等文种,都属于计划范畴。( )
A.
正确
B.
错误
查看完整题目与答案
【多选题】保险责任开始后，不得被解除的保险合同的有( )。
A.
信用保险合同
B.
货物运输保险合同
C.
人身保险合同
D.
运输工具航程保险合同
查看完整题目与答案
【单选题】When Edward, the Confessor died, the Witan chose ______as English King.
A.
William
B.
Arthur
C.
Harold
D.
Henry
查看完整题目与答案
【单选题】When Edward, the Confessor died, the Witan chose _________ as English King.
A.
Duke William
B.
Edith
C.
Harold
D.
Tostig
查看完整题目与答案
【简答题】根据下面材料，回答第 21～25 题： 第 21 题 In the first paragraph, Damien Hirst's sale was referred to as 'a last victory' because __.（ ） [A] the art market had witnessed a succession of victories [B] the auctioneer ...
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【单选题】关于人身保险合同，说法有误的是( )。
A.
人身保险合同是以人的寿命和身体为保险标的的保险合同
B.
被保险人同意保险人为其订立合同的，规为投保人对被保险人具有保险利益
C.
以死亡为给付保险金条件的合同，未经被保险人书面同意认可保险金额，合同无效
D.
人身保险的受益人由被保险人或者投保人指定，投保人指定受益人时必须经被保险人同意
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【单选题】阅读短文，回答 21～25 题： 第 21 题 The purpose of George Spilich's experiments is ________
A.
to test whether smoking has a positive effect on the mental capacity of smokers
B.
to show how smoking damages people's mental capacity
C.
to prove that smoking affects people's regular performance
D.
to find out whether smoking helps people's short-term memory
查看完整题目与答案
【简答题】Martin Luther King sought black equality by ______ but he died from violence.
查看完整题目与答案
【单选题】When a king died, who would typically take over the throne?
A.
His wife, the queen
B.
His firstborn son
C.
The lord
D.
His firstborn daughter
查看完整题目与答案
相关题目：
【单选题】When the applause ______, Obama continued his speech.
A.
died off
B.
died down
C.
died out
D.
died of
查看完整题目与答案
【判断题】“规划”、“部署”、“安排”、“打算”、“方案”、“工作纲要”、“工作意见”、“要点”等文种,都属于计划范畴。( )
A.
正确
B.
错误
查看完整题目与答案
【多选题】保险责任开始后，不得被解除的保险合同的有( )。
A.
信用保险合同
B.
货物运输保险合同
C.
人身保险合同
D.
运输工具航程保险合同
查看完整题目与答案
【单选题】When Edward, the Confessor died, the Witan chose ______as English King.
A.
William
B.
Arthur
C.
Harold
D.
Henry
查看完整题目与答案
【单选题】When Edward, the Confessor died, the Witan chose _________ as English King.
A.
Duke William
B.
Edith
C.
Harold
D.
Tostig
查看完整题目与答案
【简答题】根据下面材料，回答第 21～25 题： 第 21 题 In the first paragraph, Damien Hirst's sale was referred to as 'a last victory' because __.（ ） [A] the art market had witnessed a succession of victories [B] the auctioneer ...
查看完整题目与答案
【单选题】关于人身保险合同，说法有误的是( )。
A.
人身保险合同是以人的寿命和身体为保险标的的保险合同
B.
被保险人同意保险人为其订立合同的，规为投保人对被保险人具有保险利益
C.
以死亡为给付保险金条件的合同，未经被保险人书面同意认可保险金额，合同无效
D.
人身保险的受益人由被保险人或者投保人指定，投保人指定受益人时必须经被保险人同意
查看完整题目与答案
【单选题】阅读短文，回答 21～25 题： 第 21 题 The purpose of George Spilich's experiments is ________
A.
to test whether smoking has a positive effect on the mental capacity of smokers
B.
to show how smoking damages people's mental capacity
C.
to prove that smoking affects people's regular performance
D.
to find out whether smoking helps people's short-term memory
查看完整题目与答案
【简答题】Martin Luther King sought black equality by ______ but he died from violence.
查看完整题目与答案
【单选题】When a king died, who would typically take over the throne?
A.
His wife, the queen
B.
His firstborn son
C.
The lord
D.
His firstborn daughter
查看完整题目与答案
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