买卖合同中卖方根本违约所承担的损害赔偿责任，在性质上是( )
A．原给付义务 B．主给付义务C．第二次给付义务 D．附随义务
参考答案：C
某市在今年4月份突遇大风、冰雹天气的袭击，造成直接经济损失5000万元，5000万元用科学记数法表示为 万元．
.Modern agriculture has greatly developed and nowadays animals are usually raised in _____ we call factory farms. As a result of this, lots of labour is saved.
A．which
B．where
C．what
D．how
