外研版七年级英语下册教材中，关于“choose as ”与“choose for ”有何区别？ choose.as.把.作为.来选择choose.for.为.而选择
八年级英语教材全解下册第七单元关于猎豹的一篇作文 Cheetah Acinonyx jubatus)：(name，say again cheetahs，is a kind of cats，is the only species under the cheetah，now is mainly distributed in the Africa and Asia.With the other cats，cheetahs rely on speed to hunt，rather than sneak attack or groups.The cheetah is the fastest land animal，rolling speed can exceed the cheetah，110 kilometers，equivalent to 100 metres world champion three times faster.The cheetah is not only the fastest land animal in cats，and the oldest members，the most unique and special varieties of alienation.The cheetah is mainly YouTiLei small prey animals，including Thomson gazelle，GeShi gazelle，impalas and small wildebeest，etc.In order to speed，cheetahs，gradually evolved slender waist fine claws can like other cats，in force at that also telescopic than other large hunting animals，so cannot and other large hunting animals such as lions and hyenas，although such success against hunting can reach than 50%，but hard to catch prey is often stronger predators，。
初一到初三的上下册英语课本各有多少单元？ 我学的是新目标的教材：七年级 一册一共有12个单元，两个单元回眸（1-6和7-12)【有两册，共24个单元，4个单元回眸】八年级 一册一共有10个单元，两个单元回眸（1-5和6-10）【有两册，共20个单元，4个单元回眸】九年级 一共.
