Power steering system sare divided into hydraulic power-assisted steering system, electro-hydraulic power-assisted steering system, electric power-assisted steering system and steer-by-wire system．

electric power-assisted steering system______

hydraulic power-assisted steering system______

electro-hydraulic power-assisted steering system______

But for his poverty, he ______ more students living in the poverty stricken areas to go to universities. A: has assisted B: would have assisted C: assist D: will assist

Signals between an icebreaker and an assisted vessel may NOT be given by _____.

She assisted the president to put priority ______ the management of the real estates.

According to the information from torque sensors and speed sensors, ECU commands the electric motor to provide the power-assisted steering．

Which type of power is not channel power? A: Coercive power B: Referent power C: Legitimate power D: Negotiating power

The middle school is ________ to a normal college.( ) A: contributed B: assisted C: witnessed D: attached