【单选题】What is the main point of the report?
A.
Obama days Mandela is not only his personal hero but also a hero for the world.
B.
Obama is going to meet with the Mandela family instead of Nelson Mandela.
C.
President Obama may not get a chance to see Nelson Mandela on his trip to South Africa.
D.
The trip is bittersweet because President Obama cannot pay tribute to the man he calls a hero to the world.
【多选题】修改工具栏用窗口选择对象时,从右下角和左下角窗口拉选有什么特点?
【单选题】某一元弱酸的浓度为 0.01mol·L -1 , 298K 时离解度为 1% ,该一元弱酸的 K a 是:
【单选题】以下哪一个工作不属于外贸单证员的工作任务( )
【单选题】已知0.01 mol/L某一元弱酸的pH = 5.0,则该弱酸的Ka为:
【单选题】He added, 'President Obama is going to do_____ he thinks is necessary to get our economy moving a
A.
30.He added, 'President Obama is going to do_____ he thinks is necessary to get our economy moving again.' A.everything what
【单选题】某一元弱酸的浓度为0.01mol·L-1,298K时离解度为1%,该一元弱酸的Kθa
【单选题】What did Obama say toward progress in peace talks between Israelis and Palestinians?
A.
He says Israelis is going to have to make some difficult compromises.
B.
He said the atmosphere in which talks can restart cannot be created.
C.
He said they should work together to stop extremism and support peace.
D.
All of the above are right.