检察院在审查起诉期间认为案件需补充侦查时，可否不退回补充侦查，而由检察院自行侦查
参考答案：可以。
解析：参见上题解析。
A company is planning a $50 million expansion. The expansion is to be financed by selling $20 million in new debt and $30 million in new common stock. The before-tax required return on debt is 9 percent and 14 percent for equity. If the company is in the 40 percent tax bracket, what is the marginal weighted average cost of capital（）
A. 10.6%.
B. 9.0%.
C. 10.0%.
区域活动设计的基本规则，可以分为一般性活动规则和（）两种。
