it does all the work for you！将它在课本的某一行上移动，它会为你做所有的工作！

3．倍数表达法

In other words，the model with a camera costs the older model.Is that right?

换句话说，带照相的机型价格是旧机型价格的两倍，对吗？

重点词汇

1．It only weighs 96 grams and measures 104×72×15 mm.

它只重96克，尺寸是104×72×15毫米。

[归纳拓展]

(1)weigh vi.重量为......；vt.权衡，斟酌；称重

(2)weight n．重量

lose weight减肥

put on/gain weight长胖

by weight以重量计

[语境助记]

(1)The baby weighs three kilos.这婴儿重三公斤。

(2)He is weighing the advantage of the operation against its risk.

他在权衡做手术的好处和风险。

(3)She runs every day in order to lose weight.

她每天都跑步是为了减肥。

(4)Bananas are sold by weight.香蕉是按斤出售的。

[题组训练]

(1)A fully­grown blue whale 110 feet in length and several tons.(2016·丹阳高级中学高二期中)

A．is measured；weighs

B．measures；weighs

C．is measured；is weighed

D．measures；is weighed

(2)-What can I do for you?

-I'd like to have the package .

A．weigh B．weighing