【简答题】如图,△ABC缩小后得到△A'B'C' ,则△ABC与△A'B'C'的位似比为( )。
【判断题】理想信念,只是一个思想认识问题,而不是一个实践问题。
【多选题】What do you say when you have a bad connection on a call? ( )
A.
I can’t hear you very much.
D.
I've got really weak signal.
【简答题】Perhaps those who have been rendered unhappy by a bad theory may need a better theory to help them to recovery,just as you may need a tonic when you have been ill.
【单选题】如图,Rt△ABC中,∠ABC=90°,AB=6, BC=8,以斜边AC作正方形ACDE,则边BE的长是 [ ]
【简答题】如图,O为△ABC内一点,以O为位似中心,作△A′B′C′ ∽ △ABC,且相似比为2.
【简答题】如图,在△ABC和△A′B′C′中,∠B=∠B′,要使△ABC ∽ △A′B′C′,还需要添加一个条件是______.
【简答题】DTFD存在的充分必要条件是___________。 在___________意义下,周期DTFT形式上仍可用公式表示。 帕斯瓦尔定理表明__________.
【单选题】Which medicine should you not take when you have a bad cold? ( )
C.
Anti-inflammatory drugs
【判断题】When you have a bad cold, you'd better do a lot of sports and eat junk food.