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【简答题】
(2019· 广东肇庆二模 ) 植物光合作用合成的糖类会从叶肉经果柄运输到果实。在夏季晴朗的白天,科研人员用 14 CO 2 供给某种绿色植物的叶片进行光合作用,一段时间后测定叶肉、果柄和果实中糖类的放射性强度,结果如下表所示。请分析回答下列问题: 项目 放射性强度 ( 相对值 ) 葡萄糖 果糖 蔗糖 叶肉 36 42 8 果柄 很低 很低 41 果实 36 36 26 (1) 本实验在探究糖类的运输和变化规律时运用了 ____________ 法。 (2) 推测光合作用合成的糖类主要以 ____________ 的形式从叶肉运输到果实,理由是 ________ _______________________________________________________________________________ 。 (3) 与果柄相比,果实中蔗糖的放射性强度下降的原因是 _______________________________ 。 (4) 在上述实验中,如果在植物进行光合作用一段时间后,突然停止光照,同时使植物所处的温度下降至 2 °C ,短时间内该植物叶肉细胞中 14 C 3 的放射性强度基本不变,原因是 __________ ________________________________________________________________________________ _______________________________________________________________________________ 。
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A.
笔记本电脑
B.
化肥
C.
小汽车
D.
淀粉
【单选题】In how many of the years shown was the number of widgets sold at least three times the number of widgets sold in 1960?
A.
Four
B.
Three
C.
Two
D.
One
E.
None
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A.
formsXX.nsf
B.
Mail policies
C.
Dojo toolkit
D.
Mail template settings
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A.
by supplying incentives so the agents act in the way principal desires
B.
by ensuring that all workers co-operate to maximize the gains of their section
C.
by the agents into principals themselves
D.
by maximizing the information that the principal obtains about the behavior of the agents
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【单选题】商务谈判的四种目标之间的关系是
A.
最高目标 >实际需求目标≥可接受目标≥最低目标
B.
最高目标 >可接受目标>实际需求目标≥最低目标
C.
最高目标 >实际需求目标>可接受目标≥最低目标
D.
最高目标 >可接受目标≥实际需求目标≥最低目标
【单选题】A factory owner wants his workers to produce as many widgets as they can so he pays his workers based on how many widgets they produce. However, in order to make sure that the workers do not rush and ...
A.
by supplying incentives so the agents act in the way principal desires
B.
by ensuring that all workers co-operate to maximize the gains of their section
C.
by the agents into principals themselves
D.
by maximizing the information that the principal obtains about the behavior of the agents
【多选题】根据增值税法律制度的规定,一般纳税人销售的下列货物中,可以选择按照简易计税方法计算增值税的有( )。
A.
来自来水厂销售自产的自来水
B.
县级以下小型水力发电站生产的电力
C.
食品厂销售的食用植物油
D.
煤气公司销售的煤气
【单选题】商务谈判的四种目标之间的关系是
A.
最高目标>实际需求目标>可接受目标≥最低目标
B.
最高目标>实际需求目标≥可接受目标≥最低目标
C.
最高目标>可接受目标>实际需求目标≥最低目标
D.
最高目标>可接受目标≥实际需求目标≥最低目标
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