问题 探究题

下列为探究植物生理活动实验装置图。请据图回答。

(1)甲装置经过一昼夜的暗处理后,进行2—3小时光照,观察到烧杯中水的液面下降,同时透明塑料袋内壁出现小水滴,这种现象说明植物进行了____________作用。

(2)打开钟罩,取下透明塑料袋对叶片进行处理,滴加碘液观察到叶片不变蓝,能够验证光合作用所需的原料是____________。

(3)乙装置的广口瓶中是新鲜的金鱼藻,放在光下,当瓶内气体约有2cm高时,打开导气管,迅速将快要熄灭的火柴棍放在管口会复燃,说明光合作用的产物中有____________。

(4)丙装置广口瓶中放的是新鲜种子,在适宜的条件下过一段时间打开阀门后会发现试管中澄清的石灰水会变浑浊.此装置和实验现象验证的是_________________________________。

答案

(1)蒸腾 (2)二氧化碳  (3)氧气  (4)呼吸作用释放了二氧化碳

塑料袋内壁上的小水滴是植物蒸腾作用散失的水蒸气液化形成的,因为装置中有氢氧化钠溶液,氢氧化钠溶液能将二氧化碳吸收,所以植物就因为缺少原料而不能进行光合作用,所以叶片滴加碘液不变蓝,能使快要熄灭的火柴复燃的是光合作用释放出的氧气,种子萌发就是种子在进行呼吸作用,呼吸作用会释放出的二氧化碳能使澄清石灰水变浑浊。

阅读理解

When Bill is very young, he loves picture. His mother often draws some for him on old pieces of paper. She is very bad at drawing, but bill likes her pictures and always wants more. Then, when he is a little older, Bill’s mother gives him some pencils and a drawing book, and he begins drawing pictures, too. But they are never good .When Bill is five years old, his mother gives him a small blackboard and some pieces of a baby on the blackboard, he draws lines(线条) and rubs(擦) them out too for ten minutes , but when he looks at his picture , he is not happy. “Well”, he says at last(最后) to his mother, “I’ll put a tail(尾巴) on it and make it a monkey.”  

小题1:Bill ___ when he is very young.

A.loves watching TV very much

B.often wants his mother to draw pictures for him

C.likes old pieces of paper very much

D.always wants his mother to buy pictures for him小题2:He is a little older, so his mother gives him ____ and lets him begin drawing pictures .

A.some paper and ink

B.a book and some pens  

C.some pencils and a drawing book

D.a blackboard and some old paper小题3:How old is he when he is trying to draw a baby on the blackboard?

A.He’s five years old

B.He’s fifteen years old

C.He’s fifty years old

D.He’s five like a cat小题4:Bill wants to put a tail in the picture , so _________ .

A.it looks like a duck

B.it looks like a dog

C.it looks like a monkey

D.it looks like a cat小题5:Which of the following sentences is right?

A.Bill’s mother does will in drawing.

B.bill isn’t bad at drawing.

C.There are three people in the story.

D.Bill isn’t happy when he looks at his picture of a baby

问答题