99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

單項選擇題

The diameter of the gravity disc is too big It causes oil to flow through the water outlet We changed the disc and no （） is found in the water outlet.

A.water
B.oil
C.scale
D.ridge

你可能感興趣的試題

單項選擇題

The diameter of the crank-pins should be measured with a （）.

A.salinometer
B.thermometer
C.tachometer
D.micrometer

單項選擇題

The development of （） has kept pace with the increasing demands made by the steady rise in power produced by modem marine diesels.

A.water
B.fresh air
C.oils
D.gases

<ruby id="kjjo2"><xmp id="kjjo2"></xmp></ruby>