问题
单项选择题
风疹脑炎为风疹极罕见的并发症，发生率仅约1／5000，但病死率可高达（）
A.10％
B.20％
C.30％
D.40％
E.50％
答案
参考答案：B
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风疹脑炎为风疹极罕见的并发症，发生率仅约1／5000，但病死率可高达（）
A.10％
B.20％
C.30％
D.40％
E.50％
参考答案：B
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| Bill was out of luck that day. Mr Smith, their English teacher, made him stay in the classroom after school 1 he finished his homework. He had to do it. Mr Smith was in the office. The 2 was open and the teacher could see him if he 3 school. One hour 4 , he gave his homework to his teacher and ran home. He knew his aunt would go to see them on that day. She 5 bought some delicious cakes for them. But when he got home, he didn't 6 any cakes on the plate. His brother ate them up (吃光). The next morning the boy was still angry. He couldn't listen to his teacher carefully. "Make a sentence with 'egg', class" said Mr Smith. All the students did. Only Bill looked out of the 7 and didn't put up his hand. "Let's listen to Bill's sentence." The boy had to 8 . He thought for a few minutes and said, "I didn't eat any cakes 9 ." All of his classmates laughed. Mr Smith asked, " 10 is the egg?" "It's in the cake. Sir" |
| ( )1. A. until ( )2. A. table ( )3. A. went to ( )4. A. before ( )5. A. never ( )6. A. find ( )7. A. wall ( )8. A. get up ( )9. A. today ( )10. A. What | B. when B. desk B. got to B. ago B. sometimes B. make B. tree B. sit down B. yesterday B. When | C. because C. door C. returned C. later C. always C. keep C. school C. go to bed C. tomorrow C. Where | D. and D. book D. left D. after D. seldom D. eat D. window D. stand up D. Sunday D. How |