【单选题】形式运算阶段的儿童,其思维特征是( )。
【简答题】求下列函数的导数: (1)y=sin3x; (2) 。
【单选题】函数y=sin(2x-1)的导数是( )
【单选题】His behavior. _______ his lazy attitude toward to work.
【单选题】已知函数 f(x)=sin( π 3 -x) ,则要得到其导函数y=f′(x)的图象,只需将函数y=f(x)的图象( )
【简答题】求下列函数的导数: (1)y=log 4 x 3 -log 4 x 2 ; (2)y= 2 x 2 +1 x -2x ; (3)y=-2sin x 2 (2sin 2 x 4 -1).
【简答题】关于出境、入境 John, an Italian. If he goes to Beijing, for Italy, his behavior is 1. _______ For China, his behavior is 2. __________ For both Italy and China, his behavior is 3. __________
【单选题】The officer is gallant in his behavior. toward his young secretary.
【简答题】If your uncle is a Chinese and he goes to Paris for travelling, then for Chinese people, his behavior is _________, for French people, his behavior is _________, for both Chinese and French people, hi...