用“知识沟”理论来分析中国的弱势群体。
柴油主机暖缸的方法有（） ①用蒸汽或电加热主淡水泵出口管路上的水，并起动独立淡水泵 ②蒸汽对膨胀水箱加热并开启淡水泵 ③停航时发电机冷却水至主机冷却腔循环 ["仅①","仅②","①②","①③"]
“普通”与“科普”两个词中的“普”声调不一样，它们是一个非音质音位的两个变体。
备车中压油的主要目的是（） ["减少起动时间和起动空气耗量","减少起动初期磨擦力和机件磨损量","增大起动初期柴油机功率","提高起动初期的滑油压力"]
In face of the rising cost for higher education,fields of graduate study that are favored by students are those that（） ["offer greater professional satisfaction","make graduates more easily employed","offer easy enrollment","offer more rewarding jobs in terms of payment"]
试述伊斯兰建筑的文化特点、装饰特色和代表作品，并谈谈自己的观点。
