已知关于x一元二次方程x2-kx-4 =0的一个根为2,则另一个根是[ ]
A.4
B.1
C.2
D.-2
答案:D
产品市场营销准备工作主要包括______。
A.调查产品市场情况
B.建立产品市场营销网络
C.组织产品售后服务
D.确定产品市场营销策略
E.与协作单位签订正式合同
翻译句子。
1. They abandoned the stolen car.
2. He had to abandon the job because of illness.
3. He abandoned himself to despair.
4. The people were so excited that they jumped and shouted with abandon.