【简答题】成语“百发百中”用数学语言解释是:命中率为100%.______.(判断对错)
【简答题】成语“百发百中”,只是说明射出100支箭,射中100支的命中率,不包括射出99支和101支等全部射中的情况.______.
【单选题】Staying Smart: Advice on Navigating Your Career Millions of career changes occur each year. Some are natural, but many more occur in adverse circumstances. Other forces at work today further alter the...
【单选题】下列物质久置于空气中会发生相应的变化,其中发生了氧化还原反应的是( )
【单选题】In Michael Noers view, marrying a career woman is risky because
A.
career women will usually get unhappy.
B.
career women are feminists and demanding.
C.
it's more likely to lead to an unhappy marriage.
D.
the marriage is bound to be difficult.
【单选题】淀粉经过下列变化:淀粉→单糖→酒精→乙烯→…→草酸。在该系列变化过程中,下列反应类型一定没有发生的是( ) ①加成反应 ②氧化反应 ③加氢反应 ④消去反应 ⑤取代反应 ⑥水解反应 ⑦酯化反应 ⑧加聚反应