补体激活后，形成的膜攻击复合物是
A．C5b67
B．C5b678
C．C3bnBbp
D．C4b2b3b
E．C5b6789
参考答案：E
解析：[解题思路] 最后形成膜攻击复合物三条激活补体途径均一样，C5b6789复合物形成，进一步促进C9聚合，形成膜攻击复合物，最终导致细胞溶解破坏,这种作用可以有益，也可以破坏。[命题规律] 考察“补体激活后形成的膜攻击复合物”。必须掌握。
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| It was Sunday yesterday. Steve ___1___ a relaxing week-end. __2__ Sunday morning, he played computer games with his friends at home. It ___3___ pretty good. In the afternoon, he ___4___ with his mother. They bought many kinds of food and vegetables. It was really relaxing and exciting. In the evening, he ___5___ a talk show with his parents and listened to some songs by a ___6___ singer. ___7___ Ann had a busy weekend. She ___8___ stopped working. On Sunday morning, she cleaned her bedroom and did her homework In the afternoon, she went to visit her uncle and ___9___ him do some farm work. In the evening, she cooked dinner for her parents. After dinner, she washed all the dishes. Then she went out ___10__ a walk with her dog. What about your weekend? | |||
( )1. A. has | B. have B. At B. is B. went shopping B. watches B. medium B. Because B. always B. liked B. for | C. had C. For C. was C. went to shopping C. looked C. popular C. Or C. usually C. asked C. from | D. was D. On D. were D. went shops D. see D. long D. So D. never D. told D. on |