问题
选择题
在细胞分裂过程中，最先分成两份的是
A．细胞质
B．细胞壁
C．细胞膜
D．细胞核
答案
答案：D
细胞分裂通常是一个细胞分裂成两个细胞的过程，分裂时，细胞内的细胞核和细胞质先后分成两份，分配到两个新细胞中去。
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在细胞分裂过程中，最先分成两份的是
A．细胞质
B．细胞壁
C．细胞膜
D．细胞核
答案：D
细胞分裂通常是一个细胞分裂成两个细胞的过程，分裂时，细胞内的细胞核和细胞质先后分成两份，分配到两个新细胞中去。
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| On a hot summer day in south Florida, a little boy decided to go for a swim in the old swimming hole behind his house. In a hurry to dive into the cool water, the boy did not 1 that as he swam toward the middle of the lake, a 2 was swimming toward the shore. His mother, who was in the 3 , was looking out of the window and saw the two as they got closer together. In great 4 , she ran toward the water, yelling to her son as loudly as she could. Hearing her voice, the little boy became alarmed and made a (n) 5 to swim to his mother. It was too 6 . Just as he reached her, the crocodile reached him. From the dock, the mother grabbed her little boy by the 7 just as the crocodile snatched his legs. Then 8 an incredible tug-of-war between the two. The crocodile was much 9 than the mother, but the mother was much too passionate to let go. A farmer happened to drive by, heard her screams, raced from his truck, took his 10 and shot the crocodile. Remarkably, after weeks in the hospital, the little boy 11 His legs were extremely scarred by the attack, and, on his arms, were deep scratches where his mother's fingernails 12 his flesh in her effort to hang on to the son she loved. When a newspaper reporter who 13 the boy asked if he would show him his scars, the boy lifted his pant legs. And then, with obvious pride, he said to the reporter, "But look at my arms. I have great 14 on my arms, too. I have them because my mom wouldn't 15 ." | ||||
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