青藏地区自然环境的主要特点是[ ]
A．日照长，生长期长
B．地势高、气候寒冷
C．高山峡谷广布
D．降水和高山冰雪融水多
答案：B
一个不等于0的数除以（ ）等于1。
In relation to the law of agency, explain how an agency relationship can be established in the following ways:
(b) by ratifi cation; (2 marks)
