问题 单项选择题 A1/A2型题

自动血液培养系统作为细菌有无生长的指标,是检测细菌生长过程中产生的 ()

A.O2

B.N2

C.CO2

D.NH3

E.HCl

答案

参考答案:C

解析:细菌在繁殖代谢过程中,呼吸作用会产生CO2,故可在培养基的碳源中加入同位素标记的C元素,检测气体中含同位素的CO2即可实现仪器检测的自动化。因此本题最佳答案是C。

阅读理解

Mr White works in an office. He’s very busy and has no time to have a good rest. Every evening, when he comes back from his office, he’s always tired and wants to go to bed early. But his wife often has a lot of interesting things to tell him after dinner. She doesn’t stop talking until she falls asleep (入睡). But it’s usually too late and Mr White has to get up early in the morning when she is still sleeping.

One day Mr White felt terrible and couldn’t go to work. He decided to go to see a doctor. Mrs White went to the hospital with him. Before her husband said what was the matter with him, the woman told the doctor all. The doctor wrote out a prescription (处方). When Mrs White took the medicine to the doctor’s room, the doctor said to her, “The bottle of medicine is for your husband and the pills (药片) are for you. ”

“For me?” the woman said in surprise. “I’m fine. I don’t need any medicine!”

“I don’t think so, madam,” said the doctor. “They are sleeping pills. Your husband will be all right soon if you take them. ”

小题1:Mr White ______.

A.has time to have a good sleep

B.is busy but he can have a good sleep

C.isn’t tired and doesn’t like to go to bed early

D.doesn’t have a good rest小题2:Mr White’s wife ______ every evening.

A.works late

B.writes things

C.keeps talking late

D.watches TV late小题3:Mr White has to get up when his wife is sleeping in the morning because ______.

A.he can’t fall asleep

B.he has to go to work

C.he doesn’t want to sleep

D.his wife asks him to get up小题4:One day Mr White couldn’t go to work because ______.

A.he was ill

B.his wife was ill

C.his wife didn’t let him go

D.he didn’t want to go to work小题5:The sentence “Your husband will be all right soon if you take them. ” means Mr White will soon be all right if ______.

A.Mr White takes the pills

B.Mr White takes the bottle of medicine

C.Mrs White takes the pills

D.Mrs White stops talking too much at night

选择题