气候形成的因素包括（）。
A.种植的作物
B.太阳辐射
C.地理纬度
D.地形
参考答案：B, C, D
After being criticized by her mother, she spoke out the words ______ in her heart for many years,
tears ________ her eyes.[ ]
A. having hidden; filling
B. hidden; filled
C. hiding; being filled
D. hidden; filling
根据选择机床设备的原则，当生产类型为单件小批量生产时应选择( )。
A．专用机床
B．通用机床
C．组合机床
D．专门机床
