()1.Goodmorning.()2.Thisismyfriend.()3.Itstimetogonow.()4.Goodafternoon.()5.Howareyou?()6.What'syourname?()7.Canyouspellitplease?()8.HelloBetty.A.Goodmorning.B.YesC-A
( ) 1. Good morning.
( ) 2. This is my friend.
( ) 3. Its time to go now.
( ) 4. Good afternoon.
( ) 5. How are you?
( ) 6. What's your name?
( ) 7. Can you spell it please?
( ) 8. Hello Betty.
A. Good morning.
B. Yes C-A-T-H-Y Cathy.
C. Hi Tony.
D. Good afternoon.
E.I'm Lingling.
F.See you tomorrow.
G.Nice to meet you.
H.I'm fine thank you.
1—5 AGFDH 6—8 EBC
若|a|=5|b|=3且|a-b|=b-aa+b=?a-b=?若|a|=5|b|=3且|a-b|= 2020-05-13 …
若让元素1,2,3,4,5依次进栈,则出栈次序不可能出现?A. 5,4,3,2,1 B. 2,1, 2020-05-17 …
如图,D是等边三角形ABC中AC边的中点,E在BC的延长线上,DE=DB,若△ABC的周长为6,则 2020-06-27 …
小华买一本本子用去3角钱，付出5角钱，应找回多少钱？正确的列式计算是A.5角+3角=8角B.5角- 2020-07-28 …
一元二次方程-5x+3x2=12的二次项系数、一次项系数、常数项分别是（）A.-5，3，12B.3 2020-07-31 …
1.在一个比利中两个比的比值等于2比利的内项0.08和0.6写出这个比例（）2.A×5/7=3/7 2020-08-02 …
已知A(1,1),B(a,2)两点间的距离为5,a=?A:5.B:-3.C:-5或3.D:5或-3 2020-08-03 …
若x，y满足约束条件y≤-x+1y≤x+1y≥0，则3x+5y的取值范围是（）A.[-5，3]B.[ 2020-10-31 …
1.已知|a|=5,|b|=3,且|a+b|=a+b,求a-b的值2.若|x+1/2|+|y-1/3 2020-10-31 …
在DNA分子中与片段5'-TAGA-3'互补的片段为A.5'-TCTA-3'B.5'-ATCT在DN 2020-12-01 …