肺间质纤维化患者初期动脉血气主要表现是A.运动后PaO2降低 B.PaCO2正常 C 发布时间:2017-06-16 15:26 │ 来源:www.tikuol.com 题型:单项选择题 问题: 肺间质纤维化患者初期动脉血气主要表现是A.运动后PaO2降低B.PaCO2正常C.HCO3-降低D.休息时PaO2降低E.pH降低
题型:单项选择题 科技创新与民生问题密切相关。下列表述错误的是:A.蒸汽机车、蒸汽轮船的出现,使交通运输业发生了革命性改变B.电冰箱、洗衣机、吸尘器的使用,大大减轻了繁重的家务劳动C.互联网的出现,标志着人类从信息封闭时代进入大众传播时代D.“南优二号”杂交水稻的培育,有助于解决未来世界性饥饿问题 查看答案
题型:单项选择题 某生态系统中的4种生物a、b、c、d构成一条食物链,一年输入的能量如下表:生物种类abCd能量值(焦耳/平方米)141.1×10515.91×1050.88×105871.27×105该生态系统中,数量最少的应该是( )A.aB.bC.cD.d 查看答案
题型:单项选择题 选词并用其适当形式填空。work, close, look, have, teacher, pen, eat, China, play, climb 1. This is our ________ desk. Ours are over there. 2. Bill has three ________. One is new and the other two are old. 3. His uncle ________ very young but he is over forty. 4. Let's ________ basketball after class. 5. Look! The cats are ________ up the trees. 6. The shop isn't open. It's ________. 7. My brother ________ some new picture books. 8. In our classroom there is a large map of ________. 9. Mum, please give me something to ________. I'm very hungry. 10. Does Mr Green like ________ in this Chinese school? 查看答案
题型:单项选择题 某保险公司推出一项“希望之星”保险业务,该业务要求5岁儿童的家长每年交600元保险金并至14岁,即可享受儿童将来上大学的所有学费,则促使家长不参加投保的最适当理由为( )。A.家长并不能确定儿童将来上哪一所大学B.10年的累计保险金总额大于将来上大学的学费总和C.据估计,每年上大学的学费增长率大于生活费的增长率D.该业务并不包括支付上大学的食宿费用 查看答案