问题
单项选择题
关于视网膜母系胞瘤下列哪项是正确的（）。
A.致癌基因RBI突变所致
B.属常染色体隐性遗传
C.1–性连锁隐性遗传
D.抑癌基因RBI突变所致
E.X染色体失活所致
答案
参考答案：D
解析：视网膜母系胞瘤的发病机制是抑癌基因RBI突变所致。
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关于视网膜母系胞瘤下列哪项是正确的（）。
A.致癌基因RBI突变所致
B.属常染色体隐性遗传
C.1–性连锁隐性遗传
D.抑癌基因RBI突变所致
E.X染色体失活所致
参考答案：D
解析：视网膜母系胞瘤的发病机制是抑癌基因RBI突变所致。
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| Several years ago, while attending a communication course, I experienced a most unusual process. The instructor asked us to list anything in our past that we felt 1 of, regretted, or incomplete about and read our lists aloud. This seemed like a very 2 process, but there's always some brave soul in the crowd who will volunteer (be ready to). The instructor then 3 that we find ways to 4 people, or take some action to right any wrongdoings. I was seriously wondering how this could ever 5 my communication. Then the man next to me raised his hand and volunteered this story: "Making my 6 , I remembered an incident from high school. I grew up in a small town. There was a Sheriff none of us kids liked. One night, my two buddies(老兄) and I decided to play a 7 on him." "After drinking a few beers, we climbed the tall water tank in the middle of the town, and wrote on the tank in bright red paint: Sheriff Brown is a FOX. The next day, almost the whole town saw our glorious 8 . Within two hours, Sheriff Brown had us in his office. My friends told the truth but I lied. No one 9 found out." "Nearly 20 years later, Sheriff Brown's name 10 on my list. I didn't even know if he was still 11 . Last weekend, I dialed the information in my hometown and found there was a Roger Brown still listed. I tried his number. After a few 12 , I heard, "Hello?" I said, "Sheriff Brown?" Paused "Yes". "Well, this is Jimmy Calkins." "And I want you to know that I did it." Paused. "I knew it!" he yelled back. We had a good laugh and a 13 discussion. His closing words were: "Jimmy, I always felt bad for you because your buddies got it off their chest, but you were carrying it around all these years. I want to thank you for calling me … | |||
| ( )1. A. ashamed ( )2. A. private ( )3. A. expected ( )4. A. connect with ( )5. A. improve ( )6. A. notes ( )7. A. part ( )8. A. view ( )9. A. also ( )10. A. appears ( )11. A. angry ( )12. A. words ( )13. A. lively ( )14. A. build up ( )15. A. regret | B. afraid B. secret B. suggested B. depend on B. continue B. list B. game B. sign B. even B. considers B. happy B. calls B. plain B. make up B. forgive | C. sure C. interesting C. ordered C. make an apology to C. realize C. plan C. trick C. attention C. still C. presents C. doubtful C. repeats C. nervous C. clear up C. right | D. proud D. funny D. demanded D. get along with D. keep D. stories D. record D. remark D. ever D. remembers D. alive D. rings D. cold D. give up D. punish |