8. As there was a(n) failure and we couldn’t do anything at home without electricity, he suggested a walk out I the open, but I simply didn’t have the .
A. energy, force B. force, power
C. power, force D. power, force
7. Experts warn that global warming will cause dramatic climate changes including more
floods, heat waves and droughts.
A. usual B. ordinary C. frequent D. common
6. -It’s a red light, William. You the car.
-OK. Just in time.
A. must stop B. will stop
C. must have stopped D. should have stopped
5. Shella forgot all about the dog and the TV set, in the new magazine that had come in the mail.
A. deeply lost B. deeply losing
C. was deeply lost D. and deeply lost
4. It is only when the stress gets out of control it can lead to poor performance and ill health.
A. when B. until C. that D. before
3. -Did you attended Mary’s wedding ceremony last August?
-I wish I . I abroad.
A. had, would study B. did. Have studied
C. do , had studied D. had, was studying
2. The story is set in 1949 Beijing, year that witnessed the foundation of
New China.
A. / , a , the B. the , the , the
C. / , a , / D. the , the , /
第一节:单选题(共20小题,每小题1分,满分20分)
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。
1. -I didn’t do well in the math exam. What about you?
-I did you. Maybe even worse.
A. as well as B. not worse than
C. no better than D. not better than
(二)结果预测:
。
(三)结果及讨论:
若增强单色光光照强度,能否对实验结果产生影响?
试在右边同一坐标图中画出不同类型的单色光下,光照强度与光合作用强度的关系曲线来说明这个问题。
同升湖国际实验学校
(一)实验步骤:
(1)取生长旺盛的绿叶,用直径为1cm的打孔器打出小圆形叶片30片(避开大的叶脉)
(2)将圆形叶片置于注射器内,并让注射器吸入清水,待排出注射器内残留的空气后,用手堵住注射器前端的小孔并缓缓拉动活塞,重复几次。
(3)将处理过后的小圆形叶片放入黑暗处盛有清水的烧杯中待用,此时叶片将全都沉到水底,这是因为 。
(4)取甲、乙、丙三只小烧杯,
___________________________________________________________________________
_______________________________________________________________。
(5)观察并记录同一时间段内各实验装置中小圆形叶片浮起的数量。
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