液压支架各种阀座.阀芯.导向环和挡圈等主要密封件的材质一般为()。
A.聚乙烯
B.聚丙烯
C.聚甲醛
参考答案:C
Tom never does his homework Mary. He always makes lots of mistakes.
A. as carefully as B. carefully as C. as careful as
阅读《长亭送别》中的一段,然后回答下列问题。 [夫人云]红娘把盏者!(红把酒科)(旦唱) [满庭芳]供食太急,须臾对面,顷刻别离。若不是酒席间子母每当回避,有心待与他举案齐眉。虽然是厮守得一时半刻,也合着俺夫妻每共桌而食。眼底空留意,寻思起就里,险化做望夫石。 [朝天子]暖溶溶玉醅,白泠泠似水,多半是相思泪。眼面前茶饭怕不待要吃,恨塞满愁肠胃。蜗角虚名,蝇头微利,拆鸳鸯在两下里。一个这壁,一个那壁,一递一声长吁气。
将“暖溶溶玉醅,白泠泠似水,多半是相思泪”译成现代汉语。