某房地产开发公司欲购买一块土地用于房地产开发，该土地面积14500m2，规划用途为住宅，容积率1.5。公司经理安排市场研究部进行了研究，提出了如下研究目标：一是该块土地的最佳开发时机；二是如果近期开发，市场销售状况如何。
当某些房地产市场特征需用定性研究时，其主要方法有( )。
A．深度访谈法
B．小组访谈法
C．电话询问法
D．因特网询问法
参考答案：A,B
An analyst gathers the following information from a company's balance sheet (in millions):
| 31 December 2011 | 31 December 2010 | |
| Cash and marketable securities | $66 | $60 |
| Receivables | $22 | $20 |
| Current assets | $132 | $120 |
| Total assets | $1498 | $1345 |
| Current liabilities | $242 | $220 |
| Total liabilities | $1189 | $987 |
A. decreased since the end of 2010.
B. remained the same since the end of 2010.
C. increased since the end of 2010.