皮皮学，免费搜题
登录
搜题
【单选题】
用N A 表示加德罗常数的值。下列叙述正确的是A.
25 ℃时，pH＝12的Ba(OH) 2 溶液中含有的OH － 数目为0.02N A
B.
室温下，14.0 g乙烯和丁烯的混合气体中含有C—H键数目为2.0N A
C.
1 L 0.5 mol·L －1 的(NH 4 ) 2 SO 4 溶液中含有的NH数目为N A
D.
标准状况下，22.4 L CCl 4 中含有共用电子对数目为4.0N A
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】PLC交流双速电梯,目前层楼指示器普遍采用( )(A)七断数码管 (B)信号灯 (C)指针 (D)发光二极管A.B.C.D. D
【简答题】They aim to bring attention to the fact that there have been few of the disease in the United States. They say there is no reason to avoid Asian American businesses.
【单选题】关于施工缝处继续浇筑混凝土的说法,正确的是( )。
A.
已浇筑的混凝土，其抗压强度不应小于1.0N/mm2
B.
清除硬化混凝土表面水泥薄膜和松动石子以及软弱混凝土层
C.
硬化混凝土表面干燥
D.
浇筑混凝土前，宣先在施工铺一层1:3水泥砂浆
【简答题】He is easily the best student in the class.
【单选题】By the fact that he stayed in the United States for more than ten years, he developed an American ________.
A.
stress
B.
sound
C.
voice
D.
accent
【单选题】He is easily ____ so I do not like to talk with him.
A.
defended
B.
afforded
C.
created
D.
offended
【单选题】Each of the following is a valid conclusion from the graphs and the fact that the population of the United States was greater in 1995 than in 1991 EXCEPT
A.
In 1991, adults whose highest degree was at least a bachelor's degree were more than twice as likely to participate in adult educa-tion than those whose highest educational attainment was a high school diploma or GED (high school equivalency diploma).
B.
On a percentage basis, from 1991 to 1995, the greatest increase in the adult education par-ticipation rate was among those adults whose highest educational attainment was grades 9-12, without earning a high school diploma.
C.
In 1995, more people participated in adult edu-cation programs than in 1991.
D.
From 1991 to !995 the rate of participation in adult education among the groups represented in the graphs increased the least for those who had attained at least a bachelor's degree.
E.
In 1995, more adults with at least a bachelor's degree participated in adult education than did adults who attended some college but did not earn a college degree.
【单选题】He is easily()so I do not like to talk with
A.
defended
B.
afforded
C.
created
D.
offended
【简答题】He is easily the best student in the class.
相关题目：
参考解析：
知识点：
题目纠错 0
发布
