搜题请搜索小程序“爱下问搜题”
问题 单项选择题

只依据CD7抗原不能诊断T－ALL，原因是有的遗传学标志有（）

A.CD7与部分B淋巴细胞有交叉

B.对CD7的检测不敏感

C.CD7在T淋巴细胞的发育过程中出现较晚

D.CD7在T淋巴细胞的发育过程中出现早，但消失也早

E.CD7与急性髓细胞性白血病有5％～10％的交叉反应

答案

参考答案：E

材料分析题

“5.12”地震后，人们纷纷献出自己的爱心，抗震救灾，重建家园。小林所在的学校倡导全校师生踊跃捐款，帮助灾区人民渡过难关。对此，小林有点困惑，那么多人受灾，那么严重的灾情，我捐10元钱有用吗？学校捐助的这点钱能够解决问题吗？

（1）你能帮助小林解答疑惑吗，我们为什么要参与这样的公益活动？ 

                                                                                                                                                               

                                                                                                                                                              

                                                                                                                                                              

                                                                                                                                                              

                                                                                                                                                              

                                                                                                                                                              

（2）你参加过哪些捐赠活动？请举两个例子。

                                                                                                                                                              

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单项选择题

锚杆支护的喷体厚度必须在施工组设计或（）中规定。

A.操作规程

B.作业规程

C.煤矿安全规程
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