【简答题】简论加德纳的多层智力观及其对幼儿教育的启示。
【单选题】The parents-children relationship changes from the relative positive to the relative negative when ______.
A.
the children reach 7 or 8 years of age
B.
the children reach 13 or 14 years of age
C.
the parents begin to have too many household responsibilities
D.
the parents begin to feel there is too much burden in the house
【简答题】计算: (1)(-2a 3 b 2 ) 2 ÷a 3 b 2 ?b 2 (2) ( 2 ) 2 - (-4 ) 2 +4× 3 1 8 .
【简答题】化简求值: (1)(4a+3a 2 -3+3a 3 )-(-a+4a 3 ),其中a=-2 (2)3a 2 b-[2a 2 b-(2ab-a 2 b)-4a 2 ]-ab,其中a=-3,b=-2.
【单选题】Python 表达式 3&7 的运算结果是
【单选题】Python 表达式 3|7 的运算结果是
【单选题】下列括号中,错误3是( )
A.
a 2 -(3a-2b+4c)=a 2 -3a+2b-4c
B.
4a 2 +(-3a+2b)=4a 2 +3a-2b
C.
2x 2 -3(x-1)=2x 2 -3x+3
D.
-2(2x-y)-(-x 2 +y 2 )=-4x+2y+x 2 -y 2
【判断题】不同的客流预测类型,决定了预测结果是不相同的。
【简答题】计算: (1)(-1) 2 ×2+(-2) 3 ÷4 (2)12-(-18)+(-7)-15 (3)3a 2 -2a+4a 2 -7a (4)2(2a-2b)+3(2b-3a)
【简答题】化简 (1)3a 2 -2a+4a 2 -7a; (2)8a-a 3 +a 2 +4a 3 -a 2 -7a-6; (3)2(2a-3b)+3(2b-3a); (4)(-2ab+3a)-(2a-b)+6ab; (5)a 2 -[-4ab+(ab-a 2 )]-2ab; (6) 1 2 a 2 -[ 1 2 (ab-a 2 )+4ab]- 1 2 ab.