<rp id="os212"><wbr id="os212"></wbr></rp>

<strong id="os212"><li id="os212"></li></strong>

單項選擇題

Energy losses due to （） occur in every machine.

A.speed
B.friction
C.impact
D.atmosphere

你可能感興趣的試題

單項選擇題

Emulsion oils and sodium nitrite are both approved additives, but （） cannot be used if any pipes are galvanized or if soldered joints exist.

A.the latter
B.latter
C.former
D.the former

單項選擇題

Emulsion oils and sodium nitrite are both approved additives, but the latter cannot be used if any pipes are （） or if any soldered joints exit.

A.chromed
B.welded
C.galvanized
D.bolted