根据《破产法》的规定，企业破产案件应当由( )人民法院管辖。

A．债务人所在地

B．债权人所在地

C．申请人所在地

D．债务人所在地中级以上

Rapid application development (RAD) systems purport to lighten the developer’s (46) by making it easy to program an application with simple intuitive steps.
RAD tools (47) the developer everything needed to construct a fully functional application quickly and easily. They make short work of modifying the developed product to (48) changes after the program is finished. Applications developed with RAD tools are constructed as they are envisioned. As an application’s real usefulness (49) , the developer armed with RAD tools should be able to (50) on new features with little fuss.

A. offer B. order C. refer D. release