【单选题】The presenter says her mother
A.
has never had any sports shoes.
B.
has been wearing sports shoes for years.
C.
will buy some sports shoes soon.
【简答题】设两个相互独立的事件A与B至少有一个发生的概率为8/9,A发生B不发生与B发生A不发生的概率相等,则P(A)=( )
【简答题】学习头部插入JS代码。 比照截图,在editplus中输入相应代码。
【单选题】The main idea of this passage is__________
A.
that vicious and dangerous sports should be banned by law
B.
that people are willing to pay vast sums money to see violence
C.
to compare two different attitudes towards dangerous sports
D.
people are bloodthirsty in sports
【简答题】设两个相互独立的事件A与B至少有一个发生的概率为 ,A发生B不发生与B发生A不发生的概率相等,则P(A)=(答案用小数表示并保留两位小数)
【判断题】握手时,一般情况下,握手的时间不宜超过3秒。
【判断题】处于对数增长期的活性污泥降解有机物能力强,絮凝性好。
【判断题】处于对数增长期的活性污泥降解有机物能力强,絮凝性好。
【判断题】握手时,一般情况下,握手的时间不宜超过3秒。( )