直录
直录播课
锁定经典考点、新鲜热点
简述
在线知识性答疑
方法
陪伴备考全过程
推进
学习体系
考博学习方案
简述
构建完备学习体系
方法
透析解题思路
24时
答疑解惑
考博学习方案
简述
2大答疑通道24小时待命
方法
1天内解惑,可多次追问清空疑问
名师
大牛师资
考博学习方案
简述
考点结合考题
方法
随时学,反复听
授课形式
高清录播+互动直播,实时更新。配套资料
精编密训教材,分阶快递。教研服务
答疑、批改、督学等全程服务。配套资料
精编密训教材,分阶快递。1. Nowhere in nature is aluminum found free, owing to its always____with other elements, most commonly with oxygen.
A. being combined B. having combined C. to combine D. combined
2. Physics is the present day equivalent of ____used to be called natural philosophy, from ____ most of present day science arose.
A. which, what B. that, which C. what, which D. what, that
3. On no account ____ever leave the baby at home alone.
A. should you B. you should C. shall you D. you shall
4. ____the center of our planetary system was considered as heresy by the church in the Middle Ages.
A. It is the sun and not the earth B. That the sun and not the earth
C. Being the sun and not the earth D. The sun and not the earth