【简答题】Subways The Tokyo Metro and Toei Lines Features: The Tokyo Metro and Toei lines that make up of Tokyo’s huge subway system carry almost 8 million people each day, it the busiest system in...
【多选题】下列说法正确的是( )。
A.
物质在水溶液中溶解能力的大小可以用溶解度和溶度积来衡量。
B.
某难溶物质在水中生成或溶解达到平衡时,构晶离子浓度幂的乘积是一个常数,这个常数就是溶度积 K sp θ 。溶度积常数与构晶离子浓度间的定量关系只适用于难溶强电解质。
C.
某难溶物质的溶度积越小,该物质在中的溶解度越小,生成该难溶物质就越难。难溶物的溶度积越大,其溶解度也就越大。
D.
若在饱和溶液中加入强电解质,离子强度较大,则不能将活度积的数值当溶度积直接代入,而应换算之后代入计算溶解度。
【单选题】关于溶解度和溶度积 K sp 的关系说法错误的是 ( )
A.
溶度积 K sp 同类型难溶电解质的溶解度比较:溶度积越小,溶解度 (mol·L -1 ) 也越小。
C.
已知 K sp (AgCl) = 1.77×10 –10 ; K sp (AgBr) = 5.35×10 –13 ,则 AgCl 溶解度小, AgBr 溶解度大。
D.
溶度积 S 通过计算比较不同类型难溶电解质比较。
【单选题】The terminology “able to understand any order spoken by the officers” refers to all of the following situations EXCEPT ().
B.
directing the use of lifesaving equipment
C.
for deck department crew members to understand the terminology used in the engine room
D.
in response to a man overboard
【简答题】阅读理解 subways The Tokyo Metro and Toei Lines Features: The Tokyo Metro and Toei lines that make up of Tokyo's huge subway system carry almost 8 million people each day, it the busiest system in ...
【简答题】subways The Tokyo Metro and Toei Lines Features: The Tokyo Metro and Toei lines that make up of Tokyo’s huge subway system carry almost 8 million people each day, it the busiest system in t...
【单选题】其脸形大多为椭圆形或圆形.身体外形呈长方形带点曲线,整体外观看起来圆润并带曲线感。可能有较宽的肩‘圆润的胸部曲线、不明显的腰部线条、大大的臀部。为 身体外形特征。
【单选题】颧骨与下颌骨宽而方,脸的长度与宽度相近,给人感觉沉稳、坚毅、有工作能力但缺少女性柔美的风韵.符合何种脸型的特征