题型:填空题 用括号内所给单词的正确形式填空。1. My sister is a ________ (music).2. Jim can swim. He often helps me ________ (swim).3. She ________ (think) he can sing.4. We want to play soccer, come and join ________ (we).5. ________ he often ________ (watch) TV? 查看答案
题型:单项选择题 用某中草药预防流感,其用药组与对照组的流感发病率情况如下表,那么构成四格表的4个基本数据是()。A.14 1430 25B.14 8630 90C.100 14120 30D.100 14120 25E.100 86120 90 查看答案