【单选题】Why did the writer say it was “the first day of school”?
A.
Because he was a new teacher.
B.
Because it was the first day of school after the winter vacation.
C.
Because it was the first day of school after the summer vacation.
D.
Because it was his first day in this new university.
【判断题】Kw值是6.4×10-15 (18°C),1.00×10-14 (25 °C),由此可推断出水的电离是吸热的。
【判断题】在物价持续下跌的情况下,企业采用先进先出法计量发出存货的成本,当月发出存货单位成本小于月末结存存货的单位成本。
【单选题】25℃时水的离子积 值为1.0×10 -14 ,60℃时为1.0×10 -13 ,由此可以推断( )。
【判断题】线路送电断路器操作原则是先合低压侧开关,再合高压侧开关。( )
【简答题】A. c (H + )随着温度的升高而降低 B.在35℃时, c (H + )> c (OH - ) C.水的电离度α(25℃)>α(35℃) D.水的电离是吸热的
【单选题】Today is _____ day of the week.
【判断题】在物价持续下跌的情况下,企业采用先进先出法计量发出存货的成本,当月发出存货单位成本小于月末结存存货的单位成本。
【单选题】---__________________. ---The National Day is on October first.
A.
Is the National Day on October first?
B.
When is the National Day?
D.
What’s the date today?