The delayed value of rotation angle of the output shaft when the rotation of input shaft turns from positive to negative is . A:

A car uses a four-stroke engine. The four strokes are . A: intake, compression, power and exhaust B: injection, rotation, ignition and exhaust C: injection, carburetion, rotation and exhaust D: intake, rotation, injection and ignition

The cantilever beam shown here is subjected to two equal and opposite couples，for the section B（ ）.[img=414x136]1803a25c3173b7f.jpg[/img] A: The deflection is zero, the angle of rotation is not zero B: The deflection is not zero, the angle of rotation is zero C: Deflection and angle of rotation are both not zero D: Both deflection and angle of rotation are both zero

From the anatomical position, turning the palm to face the body is an example of ____ A: medial rotation B: lateral rotation C: circumduction D: adduction

What is the main form of turning machining? ( ) A: Workpiece rotation B: Workpiece linear motion C: Tool rotation D: Tool linear motion

4.From the anatomical position, turning the palm to face the body is an example of … A: lateral rotation B: circumduction C: medial rotation D: adduction E: flexion

A car uses a four-stroke engine. The four strokes are . A: intake, compression, ignition and exhaust B: injection, rotation, ignition and exhaust C: injection, carburetion, rotation and exhaust

In a two-stroke engine that uses a camshaft, each valve is opened _____ for every rotation of the crankshaft; in these engines, the camshaft rotates at the same speed as the crankshaft.In a four-stroke engine, the valves are opened only half as often; thus, _____ of the crankshaft occur for each rotation of the camshaft. A: once ... two full rotations B: twice ...two full rotations C: once ... one full rotation D: twice ... one full rotation

The transformation between coordinate systems contains translation and rotation transformation.

The amount of fuel injected in a particular time， or degree， of crankshaft rotation is termed （）.