问:你好,小孩肚子疼应该挂什么科。,在这边做B超说是淋巴炎,吃了好多西药都不管用。(女,4 岁) 答:应该是小儿消化内科,你孩子平时有挑食或偏食的毛病吗?
Noorduin and co﹚orkers present self゛ssembled, microscopic BaCO3/SiO2 double helices, which integrate directional emission and enantiomorph﹕pecific circular retardance. This optical response emerges from the arrangement of nanoscopic mineral crystallites in the microscopic helix, and demonstrates how ...