一些初一的英语及数学题i think he _____ A.may know B.knowshe maybe is a teacher存在错误吗the women (in red )are teachers.对括号部分提问.保留两个有效数字是指?“——”如果这是两条直线,请问他们之间是什么关系?计算（a-b)的m次方乘以（b-a)的m-1次方

b
存在应该为maybe he is a teacher
Which women are teachers?
小数点前后有两个数。。。就像3.8 4.2 4.0 5.3 等
共线
a-b=o或不等于0
=o 答案为相等
不等0 为-（a-b)的2m-1次方

不会
不存在
which are teachers？
保留从小数点往后数量个数
对称、相等
[（a-b)*(b-a)]的2m-1次方

which is the women?

B
外国人听得懂 但是很awkward
which are teachers?
保留小数点后两位
处在同一平面内
(a-b)^m + (b-a)^(m-1)

A
he maybe is a teacher存在错误,改为He may be a teacher.
maybe是副词,谓语里用情态动词may +原形be
Which women are teachers?
四舍五入后余下保留小数点后两位
重合
把（a-b)的m次方看成（a-b)的m-1次方乘以（a-b)

A 第二个吧is去掉，然后maybe分开写，which are teacher，小数点后两位，平行吧。m为偶数是b-a的2m-1
次幂，m为奇数a-b的2m-1

B 存在
what do the teachers wear
小数点前后有两个数。。。就像3.8 4.2 4.0 5.3 等
0.02就不是，零开头的数前面的两个零不算有效数字