和田玉
参考答案：
是一种软玉，俗称真玉。狭义上的讲的玉，一般指新疆和田玉。主要由透闪石、阳起石矿物组成，质地致密、细腻、温润、坚韧、光洁。
One third of our school _________ covered by trees, while the majority of our students ________ girls.
A．is, is
B．are; are
C．is; are
D．are; is
箭袖
