法洛四联症患儿突然缺氧发作应按医嘱立即给予
A．地西泮B．吗啡C．高渗葡萄糖D．膝胸卧位E．半坐卧位
参考答案：B
cos45°cos15°-sin45°sin15°=______．
_____ my father _____ my mother take good care of me. I love them so much. [ ]
A. Either; or
B. Both; and
C. Neither; nor
