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

The crankshaft deflection is at first to be （） before and after repair.

This contact(触点) is moved along the wire(导线) until a position is found at which the galvanometer(电流计) shows no deflection.

Voltage applied to these deflection plates causes a glowing dot to less.

Regular repetition and parallelism are examples showing how to achieve certain stylistic effect by taking the ( ) method. A: qualitative deviation or incongruity B: quantitative deviation or incongruity C: quantitative deviation or deflection D: qualitative deviation or deflection

The rotation angle of the cross section at the maximum deflection of the beam must be equal to zero. ( )

The smallest [u]      [/u] of the missile could bring disaster. A: collect B: deflection C: deflect

The smallest [u]      [/u] of the missile could bring disaster. A: collect B: deflection C: deflect

The rotation angle of the cross section at the maximum deflection of the beam must be equal to zero. ( ) A: 正确 B: 错误

natural disasters means A: tian is evil B: temporary deflection from the essential harmony of the universe C: nothing to do with human D: God is angry