He is very glad ____________ his friends 发布时间:2017-04-28 10:13 │ 来源:www.tikuol.com 题型:选择题 问题: He is very glad ____________ his friends again.[ ]A. seeB. to seeC. sees
题型:选择题 从海水中提取溴的反应原理是5NaBr + NaBrO3 + 3H2SO4 = 3Br2 + 3Na2SO4 + 3H2O,下列反应的原理与上述反应最相似的是A.2NaBr + Cl2 =" 2NaCl" + Br2B.KClO3 + 6HCl ="==" KCl + 3Cl2↑ + 3H2OC.2H2S + SO2 = 3S↓ + 2H2OD.AlCl3 + 3NaAlO2 + 6H2O = 4Al(OH)3↓ + 3NaCl 查看答案
题型:选择题 患者女,18岁,活动后出现头昏、乏力、气短8年,有时夜间阵发性呼吸困难。查体;颧部潮红,口唇轻度发绀,心尖区舒张期可扪及震颤,听诊心尖区第一心音亢进,舒张中期滚筒样杂音。初步诊断为A.二尖瓣狭窄B.二尖瓣关闭不全C.主动脉瓣狭窄D.主动脉瓣关闭不全E.慢性缩窄性心包炎 查看答案