题干

日常生活中对微生物的应用非常普遍,下列相关说法正确的是(  )

A:腌肉长时间不易腐烂,是由于盐分多会抑制细菌的生长

B:利用乳酸菌在无氧条件下发酵形成醋酸来制作醋

C:青霉菌产生的青霉素能杀死细菌,因此可以对患者大量使用

D:酿酒时要常开盖,保证酵母菌的活性,有利于酒精的形成

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答案(点此获取答案解析)

A

同类题1

根据句短文理解,完成下列各题。

       A group of people asked this question to a group 4-to-8-year-old children. “What does love mean?” The answers were surprising. The children would answer like they did below.

  “When my grandmother hurt her knees (膝盖), she couldn't bent (弯腰) over and paint her toenails (脚指甲) any more. So my grandfather does it for her all the time, even when his hands hurt too. That's love.”

                                                                                                                                                                   Rebecca–age 8

 “Love is when someone hurts you. And you get so mad but you don't shout at them because you know it would hurt her feelings.”

                                                                                                                                                                  Samantha–age 6

  “Love is what makes you smile when you're tired.”

                                                                                                                                                                  Terri–age 4

 “I let my big sister pick on (捉弄) me because my mum says she only picks on me because she loves me. So I pick on my baby sister because I love her.”

                                                                                                                                                                  Bethany–age 4

  “I know my older sister loves me because she gives me all her old clothes and has to go out and buy new clothes.”

                                                                                                                                                                  Lauren–age 4

   “Love is when Mommy gives Daddy the best piece of chicken.”

                                                                                                                                                                   Elaine–age 5

   “My mommy loves me more than anybody. You don’t see anyone else kissing me to sleep at night.”

                                                                                                                                                                  Clear–age 5

   “You really shouldn't say ‘I love you’ unless you mean it. But if you mean it, you should say it a lot. People forget.”

                                                                                                                                                                  Jessica–age 8