A：量筒
B：烧杯
C：试管
D：蒸发皿
Yesterday ____ (is) sunny. Jim ____ (go) to the zoo with his friends. They ____ (buy) some ice cream and ____ (see) many animals. They ____ (have) a good time.
每100克牛奶中含脂肪4克，每100克花生米中含脂肪39.2克，花生米中的脂肪含量是牛奶的10倍
已知过两点A（﹣1，1），B（4，a）的直线斜率为1，那么a的值是（ ）
