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

<pre id="s5w03"><acronym id="s5w03"></acronym></pre>

<pre id="s5w03"><legend id="s5w03"><s id="s5w03"></s></legend></pre>

<abbr id="s5w03"></abbr>

<ruby id="s5w03"><output id="s5w03"></output></ruby>

<pre id="s5w03"><strong id="s5w03"></strong></pre>

單項(xiàng)選擇題

Heat energy is a source of power, but （） will cause damage to the engine.

A.excessive heat
B.insufficient heat
C.effective cooling
D.high output

你可能感興趣的試題

單項(xiàng)選擇題

Head tank should be used to remove （） from cooling water.

A.scale
B.sludge
C.chemicals
D.air

單項(xiàng)選擇題

He said that he had turned the main engine one complete revolution with the （）.

A.turning gear
B.steering gear
C.spur gear
D.chain gear

<dl id="w07jy"><acronym id="w07jy"></acronym></dl><blockquote id="w07jy"><acronym id="w07jy"><div id="w07jy"></div></acronym></blockquote>

<dl id="w07jy"></dl>

<ruby id="w07jy"><output id="w07jy"></output></ruby>