问题 问答题

为了选择适宜栽种的作物品种,研究人员在相同的条件下分别测定了3个品种S1、S2、S3的光补偿点和光饱和点,结果如图1和图2。请回答以下问题:

(1)最适宜在果树林下套种的品种是▲,最适应较高光强的品种是▲。

(2)增加环境中CO2浓度后,测得S2的光饱和点显著提高,但S3光饱和点却没有显著改变,原因可能是:在超过原光饱和点的光强下,S2的光反应产生了过剩的▲,而S3在光饱和点时可能▲(填序号)。

(3)叶绿体中光反应产生的能量既用于固定CO2,也参与叶绿体中生物大分子▲的合成。

(4)在光合作用过程中,CO2与RuBP()五碳化合物结合的直接产物是磷酸丙精(TP),TP的去向主要有三个。下图为叶肉细胞中部分代谢途径示意图。

淀粉是暂时存储的光合作用产物,其合成物所应该在叶绿体的▲。淀粉运出叶绿体时先水解成TP或▲,后者通过叶绿体膜上的载体运送到细胞质中,学科.网合成由▲糖构成的蔗糖,运出叶肉细胞。

答案

参考答案:

(1)S2;S3

(2)ATP和[H]①②③

(3)核酸、蛋白质

(4)基质中葡萄糖葡萄糖和果糖

单项选择题 A1/A2型题
完形填空
Michael O’her lived alone with his father, and the two of them had a very special relationship. The father believed in encouragement.
Though Michael was the    21   of the class when he entered high school, his    22  continued to encourage him, but also made it very clear that he did not have to play    23   if he didn’t want to.
However, Michael loved football and was    24  to try his best at every practice. All through high school, he never   25  a practice or a game, but remained a bench warmer(替补队员) all four years. His   26  father was always in the stands, with words of   27  for him.
It was the end of the football season, and as Michael ran slowly onto the practice field shortly    28  the big final game, the coach met him with a telegram. Michael    29   the telegram and became deathly silent—his father died that morning, and the sad man left for    30  immediately.
In the third quarter,  when the team was ten points   31  , a silent young man eagerly 32 onto the sidelines. The coach and his players were shocked to see their team-mate back so    33 .
“Coach, please let me  34 . I have to play today,” said Michael. Feeling sorry for him, the coach   35  . Before long, nobody could believe their eyes. This small bench warmer played like a(n)    36 . He helped his team win finally.
When the team was cheering for their    37 , Michael was sitting in the corner all alone. The coach came to him and said, “You were fantastic! Tell me   38  you did it?”
Tears in eyes, Michael said, “Well, you knew my dad died, but did you know he was blind?” He    39  a smile, “Dad came to all my games, but today was the first time he could    40   me play, and I wanted to show him I could do it!”
小题1:.
A.strongestB.smallestC.biggestD.youngest
小题2:
A.coachB.playersC.classmatesD.father
小题3:
A.footballB.gamesC.practicesD.basketball
小题4:
A.requiredB.determinedC.satisfiedD.reminded
小题5:
A.failedB.lostC.missedD.won
小题6:
A.sympathetic B.upsetC.faithfulD.optimistic
小题7:
A.encouragementB.judgmentC.wisdomD.amusement
小题8:
A.afterB.sinceC.towardsD.before
小题9:
A.went throughB.turned overC.got overD.tore up
小题10:
A.schoolB.homeC.fieldD.class
小题11:
A.aheadB.besideC.behindD.away
小题12:
A.walkedB.ranC.steppedD.slipped
小题13:
A.quietly B.sadlyC.punctuallyD.soon
小题14:
A.goB.fightC.workD.play
小题15:
A.leftB.refusedC.agreedD.cried
小题16:
A.starB.sonC.amateurD.trainer
小题17:
A.victoryB.awardC.memorial D.unity
小题18:
A.whyB.whenC.whereD.how
小题19:
A.spreadB.skippedC.forcedD.stopp
小题20:
A.hearB.seeC.feelD.make