根据冰川所处的()、()条件及冰川分布的()和()特征,冰川可以分为大陆冰川和山岳冰川两种主要类型。
参考答案:气候,地形,规模,形态
There are about 3,000 students in our school, _____ made up of girls.[ ]
A. 46% of them
B. and 46% of them
C. 46% of whom
D. and 46% of whom are
电机车连接装置的作用是什么?