皮皮学，免费搜题
登录
搜题
【单选题】
国际计量大会第 26 届会议新修订了加徳罗常数 (N A =6.02214076×10 23 mol -1 ) ,并于 2019 年 5 月 20 日正式生效。下列说法中正确的是( )A.
6.0g SiO 2 中含 Si － O 键的数目为 0.4 N A
B.
25 ℃ 时， pH ＝ 13 的 NaOH 溶液中， OH － 的数目为 0.1 N A
C.
100.0g 质量分数为 46% 的酒精与足量的钠反应产生氢分子数为 0.5 N A
D.
11.2LCl 2 溶于足量水，所得溶液中 Cl 2 、 Cl - 、 HClO 和 ClO - 四种微粒总数为 0.5N A
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】马克思主义的三个基本组成部分是 ( )、( )、( )。
【单选题】It,s really no business of yours_____I spend my summer holidays．
A.
who
B.
which
C.
where
D.
whom
【单选题】My holidays passed quickly, but I did not
A.
sent cards to my friends.
B.
send cards my friends .
C.
sent cards my friends.
D.
send cards to my friends.
【单选题】My uncle is still ___.
A.
on the holiday
B.
on holiday
C.
on a boliday
D.
on holidays
【单选题】(He asked what) (had the weather been) like during my holidays and I (said) that (it had been awful).
A.
He asked what
B.
had the weather
C.
said
D.
it been awful
【单选题】My parents,______touring in Britain, are looking forward to a traditional English afternoon tea in a beautiful setting.
A.
nowadays
B.
instantly
C.
presently
D.
intently
【单选题】This summer my family are ______ going to Dalian for holidays.
A.
each
B.
every
C.
all
D.
both
相关题目：