现代汽车空调系统中,实际使用的制冷剂有()。A.氨 B.水和二氧化碳 C.氟里昂12 发布时间:2017-07-30 15:28 │ 来源:www.tikuol.com 题型:多项选择题 问题: 现代汽车空调系统中,实际使用的制冷剂有()。A.氨B.水和二氧化碳C.氟里昂12D.甲烷E.氟里昂134a
题型:多项选择题 从每小题的A、B、C、D四个选项中,找出与所给单词划线部分读音相同的选项小题1:attach A.cashB.arrivalC.afterwardsD.invitation小题2:style A.uglyB.yellowC.satisfyD.yesterday小题3:gather A.breathB.clothingC.worthD. thought小题4:extra A.experienceB.existC.examineD.exercise小题5:announce A.outlineB.dangerousC.woundD.Trouble 查看答案
题型:多项选择题 — ______ to the United States? — No, never, but I went to Canada a few years ago.A. Have you been B. Have you gone C. Did you go D. Will you go 查看答案