问题 选择题

培养细菌和真菌的一般步骤是(  )

①高温灭菌 ②接种 ③配制含有营养物质的培养基 ④恒温培养

A.①②④③

B.②①④③

C.③①②④

D.①③②④

答案

答案:C

题目分析:细菌和真菌的生活需要一定的条件,如水分、适宜的温度、还有有机物,因此首先要配制含有营养物质的培养基,可以用牛肉汁加琼脂熬制,然后把培养基和所有用具进行高温灭菌,以防杂菌对实验的干扰,为防止高温杀死细菌、真菌,要等冷却后,再进行接种,接种后放在温暖的地方进行恒温培养,注意:定期观察并详细记录实验现象,故选C。

单项选择题 A1/A2型题
完形填空

阅读匹配 阅读材料,根据每段内容从A 至F中选出恰当的匹配内容。(共5小题,计10分)

小题1:No Bollywood movie is thought complete without a few songs and dances. In fact, music is an    important part of Bollywood movies. Even a bad movie can still do well if the music is good.

小题2:Several Asian hospitals are doing experiments with tele-medicine. Tele-medicine is a technology that allows doctors to "see" patients without them being in the same place.

小题3:Failure is what often happens. It is everywhere in our life. Students may fail in exams, scientists may fail in their research work, and players may fail in competitions. 

小题4:The summer holiday is coming, which can be a relaxing time for sleeping, eating good meals and seeing old friends. Try to take some time off from school and spend a few weeks of fun.

小题5:I played a country girl in my last movie. I had to live in a small village with the other actors for part of the winter. To help me play a country girl better, I even walked a few miles sometimes to get water, as there was none in the houses. 

A.Jessica can sing many songs but this time in the movie she acts as a country girl.

B.Pierre will graduate from a medical university and he wants to know much about medical science.

C.Alicia is from America. She is in high school. She is a fun, energetic person.

D.Max is a music lover. Especially he loves music in movies.E. Sophia failed in the last exam. What will she do ?

F. Jefferson is a super tour guide. He can help people know where to visit.