甲公司从市场上购买丙公司生产的部件a，作为生产架公司产品的部件。乙公司已经取得部件a的中国发明权，并许可丙公司生产销售该部件a。甲公司的行为______。

A．构成对乙公司权利的侵害
B．不构成对乙公司权利的侵害
C．不侵害乙公司的权利，丙公司侵害了乙公司的权利
D．与丙公司的行为共同构成对乙公司权利的侵害

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.

（48）是（）

A.accommodate

B.account

C.decrease

D.eliminate