某小学有教师32人,学生451人。全校师生参加浇树话动,如果每50人分成一组,最多够分成几组?
(32+451)÷50=9(组)……33(人) 最多够分成9组。
Will knew there was no doubt ______ that patch of grass on the other side was in a different world.
A.which
B.what
C.that
D.whether
胶体均具有电荷,但大多数土壤胶体带()。
A.正电荷
B.负电荷
C.反电荷