问题 选择题

为验证植物的生长需要无机盐,某同学做了如下探究实验:将两株生长状况完全相同的健壮幼苗分别培养在蒸馏水和土壤浸出液中,一段时间后,两株幼苗的生长状况分别是

A.均生长良好

B.均生长不好

C.土壤浸出液中培养的生长良好,蒸馏水中培养的生长不好

D.土壤浸出液中培养的生长不好,蒸馏水中培养的生长良好

答案

答案:C

题目分析:由分析可知,植物的生长需要无机盐,土壤浸出液中含有各种无机盐以及营养物质,可以满足植物生长的需要,因此土壤浸出液中培养的生长良好,而蒸馏水中不含无机盐等营养物质,因此期内的幼苗生长不好,可见C符合题意。

阅读理解

Reading Comprehension

  One day a teacher and his student lay down under a big tree near the big grass area. Then the student

suddenly asked the teacher, "Teacher, I wonder how I find my good friend. Can you please help me?"

  Saying nothing for a few seconds, the teacher then answered, "Well, it's a pretty hard and an easy

question."

  "Look that way. There is a lot of grass. Why don't you walk there? Please don't walk backwards,

just walk straight ahead. On your way, try to find a blade (叶片) of beautiful grass and pick it up and then

give it to me, but just one."

  The student said, "Well, OK then…Wait for me…" and walked straight ahead to the grassy field.

  A few minutes later the student came back.

  The teacher asked, "Well, I don't see a beautiful blade of grass in your hand."

  "On my way, I found quite a few beautiful blade of grass, but I thought that I would find a better one,

so I didn't pick it. But I didn't know that I was at the end of the field, and I hadn't picked any because you

told me not to go back, so I didn't go back."

  The teacher said, "That's what will happen in real life. Grass is the people around you, the beautiful

blade of grass is the people that attract you and the grassy field is time. In looking for your soul mate,

please don't always compare and hope that there will be a better one. By doing that, you'll waste your life

time. Please remember 'Time Never Goes Back'."

1. What did the student want to find?

A. A good friend.  

B. Confidence.

C. Skill.

D. Energy.

2. What did the teacher ask him to do?

A. To walk straight ahead.

B. To find more blades of beautiful grass.

C. To find a blade of beautiful grass.

D. To find a beautiful flower.

3. What does the beautiful blade of grass stand for?

A. People.

B. Friendship

C. Time.  

D. Life.

4. What can we learn from the story?

A. We should save our time.

B. We should protect our environment.

C. We can always find many blades of beautiful grass.

D. We shouldn't waste lifetime only in hoping a better thing.

单项选择题