皮皮学，免费搜题
登录
logo - 刷刷题
搜题
【多选题】
好气性发酵需要无菌空气,概括起来无菌空气在发酵生产中的作用是( )
A.
能给微生物提供氧气
B.
能起一定的搅拌作用，促进菌体在培养基中不断混合，加快生长繁殖速度
C.
打碎泡沫，防止逃液
D.
保持发酵过程的正压操作
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案：
举一反三
【判断题】相互易位杂合体会产生败育的花粉,其原因是在性母细胞减数分裂的后期 I 的相邻式分离,会形成和倒位杂合体相同的重复 - 缺失染色体。A. 错 B. 对
A.
正确
B.
错误
查看完整题目与答案
【单选题】健康动物的肺泡呼吸音类似
A.
“夫、夫”声
B.
“赫、赫”声
C.
捻发声
D.
雷鸣声
查看完整题目与答案
【单选题】— It is unwise for some people to drive and talk on a cell phone. —_______. It’s very dangerous.
A.
I couldn’t agree more
B.
Not really
C.
Good idea
D.
That’s great
查看完整题目与答案
【判断题】轻钢龙骨隔墙安装中,竖向龙骨间距一般不大于800mm。
A.
正确
B.
错误
查看完整题目与答案
【单选题】听力原文：W: I've to go to Washington this afternoon, but I'm too tired to drive and the bus is so uncomfortable. M: No problem. I'll save you the cost of a taxi by dropping you off at the train station on...
A.
Riding.
B.
By bus.
C.
Driving.
查看完整题目与答案
【单选题】男性，30岁。于8月2日突发寒战，高热，体温39～40℃，剧烈胸痛，呼吸急促，咳嗽，血性泡沫痰。查体：两肺可闻及散布湿性啰音，胸片呈支气管肺炎改变。病人于发病前1周曾到过云南西部狩猎。本病的传染源包括（）
A.
鼠类和其他啮齿动物
B.
肺鼠疫病人
C.
健康带菌者
D.
恢复期带菌者
E.
以上均是
查看完整题目与答案
【简答题】阅读理解。 Mr Knott was a teacher. He taught in a big school in London. He lived a long way from the school, so he was usually quite tired when he got home. At nine o'clock one evening when he was in bed, ...
查看完整题目与答案
【简答题】阅读理解。 Mr.Knott[not] was a teacher. He taught in a big school in London. He lived a long way from the school, so he was usually quite tired when he got home. At nine o'clock one evening when he was in ...
查看完整题目与答案
【判断题】相互易位杂合体会产生败育的花粉，其原因是在性母细胞减数分裂的后期I的相邻式分离，会形成和倒位杂合体相同的重复-缺失染色体。
A.
正确
B.
错误
查看完整题目与答案
【简答题】Man has a blood tie with nature and nobody can live outside nature. Nature provides us with everything we need: the air we breathe, the water we drink, and the food we eat. For quite a long time after...
查看完整题目与答案
相关题目：
【判断题】相互易位杂合体会产生败育的花粉,其原因是在性母细胞减数分裂的后期 I 的相邻式分离,会形成和倒位杂合体相同的重复 - 缺失染色体。A. 错 B. 对
A.
正确
B.
错误
查看完整题目与答案
【单选题】健康动物的肺泡呼吸音类似
A.
“夫、夫”声
B.
“赫、赫”声
C.
捻发声
D.
雷鸣声
查看完整题目与答案
【单选题】— It is unwise for some people to drive and talk on a cell phone. —_______. It’s very dangerous.
A.
I couldn’t agree more
B.
Not really
C.
Good idea
D.
That’s great
查看完整题目与答案
【判断题】轻钢龙骨隔墙安装中,竖向龙骨间距一般不大于800mm。
A.
正确
B.
错误
查看完整题目与答案
【单选题】听力原文：W: I've to go to Washington this afternoon, but I'm too tired to drive and the bus is so uncomfortable. M: No problem. I'll save you the cost of a taxi by dropping you off at the train station on...
A.
Riding.
B.
By bus.
C.
Driving.
查看完整题目与答案
【单选题】男性，30岁。于8月2日突发寒战，高热，体温39～40℃，剧烈胸痛，呼吸急促，咳嗽，血性泡沫痰。查体：两肺可闻及散布湿性啰音，胸片呈支气管肺炎改变。病人于发病前1周曾到过云南西部狩猎。本病的传染源包括（）
A.
鼠类和其他啮齿动物
B.
肺鼠疫病人
C.
健康带菌者
D.
恢复期带菌者
E.
以上均是
查看完整题目与答案
【简答题】阅读理解。 Mr Knott was a teacher. He taught in a big school in London. He lived a long way from the school, so he was usually quite tired when he got home. At nine o'clock one evening when he was in bed, ...
查看完整题目与答案
【简答题】阅读理解。 Mr.Knott[not] was a teacher. He taught in a big school in London. He lived a long way from the school, so he was usually quite tired when he got home. At nine o'clock one evening when he was in ...
查看完整题目与答案
【判断题】相互易位杂合体会产生败育的花粉，其原因是在性母细胞减数分裂的后期I的相邻式分离，会形成和倒位杂合体相同的重复-缺失染色体。
A.
正确
B.
错误
查看完整题目与答案
【简答题】Man has a blood tie with nature and nobody can live outside nature. Nature provides us with everything we need: the air we breathe, the water we drink, and the food we eat. For quite a long time after...
查看完整题目与答案
参考解析：
知识点：
题目纠错 0
发布
创建自己的小题库 - 刷刷题