【单选题】室温下,0.1mol·L -1 某一元弱碱(AOH)溶液中c(OH - )/c(H + )=1.0×10 8 ,下列叙述不正确的是
B.
该溶液中由水电离出的c(OH - )=1.0×10 -11 mol·L -1
C.
该溶液中水的离子积常数K W 为1.0×10 -14 mol·L -2
D.
用pH=1的盐酸溶液V 1 L与V 2 L0.1mol·L -1 的AOH溶液混合,若混合溶液pH=7,则V 1 =V 2
【单选题】Though he thinks highly of the development of computer science, the author doesn't mean that
A.
computers are likely to become a new form. of intelligent life
B.
human beings }lave lost control of computers
C.
the intelligence of computers will eventually surpass that of human beings
D.
the evolution of intelligence will probably depend on that of electronic brains
【单选题】这种微笑只有面部肌肉的表现,不是发自内心的 “ ( ) 微笑” 。
【单选题】下列叙述中,正确的说法是____。
D.
操作系统和各种程序设计语言的处理程序都是系统软件
【单选题】What does the woman mean?
A.
She doesn't want to lend the book to the man.
B.
She will lend the book to the man, but now.
C.
She is not sure what to do.
【单选题】茉莉醛具有浓郁的茉莉花香,其结构简式如下图所示。关于茉莉醛的下列叙述正确的是 [ ]
B.
在加热和催化剂作用下加氢,每摩尔茉莉醛最多能消耗2mol氢气
C.
一定条件下,茉莉醛能被银氨溶液、新制氢氧化铜等多种氧化剂氧化
D.
从理论上说,202g茉莉醛能从足量银氨溶液中还原出108g银
【简答题】请在2020春夏秀场找十幅综合法的运用服装图片十张,并注明具体用了哪几种方法?
【单选题】刚才大家欣赏到的是歌手张杰演唱的,歌曲名称是: