正态分布是()。 A.以t值为中心的频数分布 B.以参数为中心的频数分布 C.以变量 发布时间:2017-05-15 17:37 │ 来源:www.tikuol.com 题型:单项选择题 A1/A2型题 问题: 正态分布是()。A.以t值为中心的频数分布B.以参数为中心的频数分布C.以变量为中心的频数分布D.以观察例数为中心的频数分布E.以均数为中心的频数分布
题型:单项选择题 A1/A2型题 完型填空。 There is a shop near my home. It (1) many things like bread, milk, (2) and drinks. My mother often goes shopping there (3) Sundays and buy food. I go with her, too, and carry baskets (4) her. The people in the shopare very friendly. They (5) us put the heavy things on the bikes. It doesn't sell (6) . I must buy rulers, pens andpencils in other shops. The shop is not open (7) eight o'clock in the morning, so don't go to buy things for (8). It (9) at ten in the evening. Mother says we can go there (10) supper time. But I think it is too late. ( ) 1. A. is sell ( ) 2. A. cakes ( ) 3. A. in ( ) 4. A. with ( ) 5. A. help ( ) 6. A. food ( ) 7. A. after ( ) 8. A. supper ( ) 9. A. stops ( ) 10. A. after B. sells B. bikes B. at B. near B. ask B. school things B. before B. lunch B. leaves B. before C. is buy C. pencils-boxes C. on C. help C. want C. kites C. at C. breakfast C. opens C. at D. buys D. books D. about D. for D. like D. drinks D. in D. class D. closes D. in 查看答案
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题型:单项选择题 A1/A2型题 局部浸润麻醉产生中毒反应的原因,下列哪项是错误的()A.一次用药量超过最大剂量B.注射部位血管丰富C.误将麻醉药注入血管内D.病人对局麻药过敏E.病人对局麻药的耐药量降低 查看答案