圆内接正方形ABCD,边AD所对的圆周角的度数为( )
45°,135°
下列采购事例中属于非生产的资本性采购的是()
A、一家汽车制造厂采购一批数控机床的钻头
B、某印刷企业采购两台印刷机
C一家生产制造企业采购四辆职工上下班用的班车
D、某公司采购一批办公室照明用日光灯管
______ destroying the forests, a large quantity of desert has covered the land.
[ ]
A. Thanks to
B. As a result of
C. In order to
D. In case of