______ are produced when the obstruction is complete at first then released slowly w

In all，6 000 companies are__________ in producing the parts that are needed for these airc

When the propeller blades are integral with the hub, the propeller is called a _____.A.bui

When considering the lowest fuel system operating temperature, _____ are important.A.speci

The vibrating of the vocal cords when sounds produced is regarded as__________.A、Voici

The findings of the experiment show that ______.A．errors are more likely when a referee ke

The sounds produced without the vocal cords vibrating are ______ sounds.A.voicelessB.voice