吸入后可到达呼吸道深部的颗粒物,其空气动力学直径一般小于A.20μm B.15μm 发布时间:2017-12-06 11:59 │ 来源:www.tikuol.com 题型:单项选择题 问题: 吸入后可到达呼吸道深部的颗粒物,其空气动力学直径一般小于A.20μmB.15μmC.10μmD.7.5μmE.5μm
题型:单项选择题 The little boy, who had _____ gift for music from an early age, is considered to be _____ future Beethoven by his teachers.A.the; /B./; aC.a; aD.the; / 查看答案
题型:单项选择题 病历摘要:蔡女士,26岁,停经20周作产前检查,医生作骨盆外测量,髂前上棘间径26cm,髂嵴间径28cm,骶耻外径19.5cm,出口横径9.5cm,检查骶骨凹正常。体查:精神好,胎心142次/分,血压96/70mmHg。卵巢分泌的激素有()A.雌激素B.雄激素C.绒毛膜促性腺激素D.生乳素E.孕激素 查看答案