题干

将酵母菌培养液进行离心处理。把沉淀的酵母菌破碎后,再次离心处理为只含有酵母菌细胞质基质的上清液和只含有酵母菌细胞器的沉淀物两部分,与未离心处理过的酵母菌培养液分别放入甲、乙、丙三个试管中,并向这三个试管内同时滴入等量、等浓度的葡萄糖溶液。在有氧的条件下,最终能通过细胞呼吸产生的CO2和H2O的试管是(  )

A:甲

B:丙

C:甲和乙

D:丙和乙

上一题 下一题 0.0难度 选择题 更新时间:2010-12-28 01:54:02

答案(点此获取答案解析)

B

同类题1

根据短文理解,填空。

    Every year, there is a big day for book lovers. It is World Book Day on April 23. Why not read a new book? Reading is a good habit to have in life. It shows you a different world and makes you think differently. Here are some good books Time for Kids picked out. Let's take a look!

    This Side of Wild (2015)

    Gary Paulsen, US

    If you are interested in nature (自然) and animals, this book is for you! This book tells true stories of the writer and some animals he loved. For example, a dog helped Paulsen during a bear attack (袭击), and another time a horse led him across a desert (沙漠). Surprisingly, animals can do many things. You may laugh sometimes. But these touching experiences may also make you cry.

    Diary of a Wimpy Kid: Old School (2015)

    Jeff Kinney, US

    You may have heard of this book series(系列). And this is the 10th book from it. Greg Heffley is a middle school student. He has everyday problems. Now things get even more interesting when his town decides to stop using all electronics (电子产品)! Greg faces some new problems without a mobile phone and computer. This book shows there are always a few bumps (崎岖) in the road, but you can laugh about it along the way too.

Recommendations for World ____ Day

Names of the books

Writers of the books

Introductions

This Side of Wild

Gary Paulsen

This book tells true stories of the writer and some ____  he loved.

Diary of a Wimpy Kid: Old School

Jeff Kinney

There are ____ books in this Diary of a Wimpy Kid series. How can Greg Heffley solve his problems ____ using all electronics.

Reading is a good habit to have in life. It shows you a different world and makes you think in

a ____ way.