三年级148人去参观动物园,第一批进去100人,剩下的分4批进场参观,剩下的平均每批进去多少人?
(148-100)÷4,
=48÷4,
=12(人),
答:剩下的平均每批进去12人.
The new bridge over the Jingsha River _______ last year, which makes it very easy to go to the city center. [ ]
A. built
B. was built
C. has built
D. has been built
奔驰、宝马轿车的压缩比高达9.5-10以上,必须使用97#的车用无铅汽油。若使用了90#车用无铅汽油,轻则要产生(),严重时会损坏汽车发动机。
A.启动困难
B.敲缸(爆震)
C.熄火
D.油耗降低