题干

 下图为细菌的结构示意图,请认真看图并回答。
 
⑴ 一个细菌也是一个细胞,与真菌的细胞相比,细菌的结构中没有____ 。与植物细胞相比,相同之处是都有[2]细胞壁、[3] 细胞膜和____ ,但没有____ ,所以多数细菌的营养方式是异养型。              
⑵ 图1中[ 1 ]是____ ,对细菌有一定的保护作用;能够使细菌在水中游动是____ 。                       
⑶ 大多数细菌在生态系统中属于____ 者,参与自然界的____ 循环。细菌对人类也有有益的一面,试举出一个例子:____ 。

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答案(点此获取答案解析)

成型的细胞核,4细胞质,叶绿体,荚膜,6鞭毛,分解,物质,利用乳酸菌制作酸奶/泡菜

同类题5

   The teacher stood before his class and was going to hand out the final exam papers. “I know how 1you have all worked to prepare for this test,” he said. “And because I know you can do it well, I am willing to offer a B to anyone who would 2 not to take the test.
Many students jumped up to 3 the teacher and left the classroom. The teacher looked at the 4 students and said, “Does anyone else want to get a B? This is your last 5.” Two more students decided to go.
   Seven students remained. The teacher then handed out the 6. There were only three sentences typed on the paper: Congratulations! You have just 7 an A in this class. Keep believing in yourself.
   I never had a teacher like that, but I think it is a test 8 any teacher could and should give. Students who are not 9 in what they have learned are B students at best(充其量).
   The same is 10 in real life. The A students are those who believe in what they are doing because they have 11 both successes and failures. They have learned life’s lessons, either from normal education 12 from events in their lives, and have become 13 people.
    Scientists say that by the age of eight, 80% of what we believe about ourselves has already been formed. You are a big kid now, and you 14 that you have some limits (限制). However, there is 15 you can't do or learn or be. Sir Edmund Hillary, the first person to reach the summit of Mount Everest said, “It’s not the mountain we conquer(克服) but ourselves.