The plane succeeded in carrying the boy on board with ______ in the air. A: one wheel B: two wheels C: three wheels D: four wheels

The plane succeeded in carrying the boy on board with ______ in the air.A. one wheel C. three wheelsB. two wheels D. four wheels A: two wheels B: four wheels C: three wheels D: The plane succeeded in carrying the boy on board with ______ in the air. E: one wheel

What did “being on wheels” mean in the past?In the past “being on wheels” means _________________.

If only the two of the wheels lose their brakes, the other two wheels will still be able to stop the car．

The prismatic transmission shaft is shown in the figure. Wheels B and D are driving wheels and wheels A, C ,E are driven wheels. If the input powers on driving wheels B and D are equal, the output powers on driven wheels A, C and E are equal too, and if only torsional deformation is considered and bending deformation is not considered, the position of dangerous section is ( ).[img=385x158]1803a368564fb94.png[/img] A: Only in segment AB; B: In segment BC; C: In segment CD; D: In segment AB and segment DE.

The train's wheels are attached to this frame.

ailcar that consists of an uncovered, at bed on wheels

(2). The United States is renowned for “A country on wheels”.

Why was the bike unusualBecause its wheels were of ______ .

the wheels of the old wagon are nearly ______ those of a modern car.