增大飞机机翼展弦比，可减小飞机诱导阻力。
参考答案：对
Constant practice has erased my accent to a point _____ people think I’m a native speaker.
A．that
B．which
C．in which
D．at which
施工、房地产开发企业缴纳城乡维护建设税的计税依据是( )。
A．营业收入 B．营业税C．增值税 D．营业税和增值税
