姐姐一定比弟弟长得高．______．
由分析可知；姐姐一定比弟弟长得高，说法错误；
故答案为：×．
As we all know the H1N1 Flu is so serious, students can't go into the school ______ they take the
temperature and get sure they don't have a fever. [ ]
A. till
B. after
C. when
D. until
肿瘤的特异性免疫治疗是应用（）
A．麻疹疫苗
B．短棒状杆菌疫苗
C．接种自身瘤苗
D．a-干扰素
E．白细胞介素-2
