A:Not the teacher but the student
B:Both the students and the teacher
C:Neither the teacher not the student
D:Not the students but the teacher
读拼音,写词语。
shàng yóu
lì qì
ní shā
ní tǔ
huān kuài
qīng qīng
____
Do you ________ your lost keys?
解不等式组,把它的解集在数轴上表示出来,并求该不等式组所有整数解的和.
.