皮皮学，免费搜题
登录
搜题
【单选题】
N A 为伽德罗常数，下列叙述错误的是 [ ]A.
18gH 2 O中含有的质子数为10N A
B.
12g金刚石中含有的共价键数为4 N A
C.
46gNO 2 和N 2 O 4 混合气体中含有的原子总数为3N A
D.
1molNa与足量的O 2 反应，生成Na 2 O和Na 2 O 2 的混合物，钠失去N A 个电子
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】甲、乙两地相距a千米，一辆汽车载货b吨，从甲地运往乙地，已知汽车运输中的费用为每吨货物每运行1千米需花费m元。 （1）用代数式表示这批货物从甲地到乙地的运输费用； （2）已知这批货物在路上需进行两次检疫，每次的费用为25元，计算当a=300，b=12， m=1时，运输这批货物的总费用。
【单选题】指出间质性肺炎叙述错误之处()
A.
病原体为病毒或细菌
B.
多见于要幼儿、老年人及免疫功能低下的患者
C.
病理变化主要为小支气管壁及肺间质炎症
D.
呼吸道症状轻，体征多而重
E.
两肺门及中下肺野纹理粗，模糊，可交织成网，并有小斑点影
【简答题】阅读理解 Zhou Yan, a Junior 3 students in Taiyuan, wishes he never got a mobile phone. Last week, he went to see a doctor because his arms and fingers were hurting, and he could not see very well. The doc...
【单选题】Will is paid $10 an hour for the first 40 hours per week that he works. He can also work as many hours overtime as he wishes to. He is paid $15 an hour for every hour that he works beyond 40 hours a w...
A.
he will choose to work fewer hours per week.
B.
he will choose to work more hours per week.
C.
he will choose to work the same number of hours per week.
D.
he will choose to work more hours per week if and only if his income exceeds his labor income
【单选题】在Word 2010中,要给段落添加底纹可以通过( )实现。
A.
“开始”选项卡“段落”组“底纹”按钮
B.
“插入”选项卡“底纹”按钮
C.
“开始”选项卡“字体”按钮
D.
以上都可以
相关题目：
参考解析：
知识点：
题目纠错 0
发布
