不定项选择下列说法正确的是( ) A.物体放出热量,温度一定降低 B.物体内能 发布时间:2017-07-16 22:04 │ 来源:www.tikuol.com 题型:不定项选择 问题: 不定项选择下列说法正确的是( )A.物体放出热量,温度一定降低B.物体内能增加,温度一定升高 C.热量能自发地从低温物体传给高温物体D.热量能自发地从高温物体传给低温物体
题型:不定项选择 I would have come earlier, but I ________ that you were waiting for me. A.hadn’t known B.didn’t knowC.would have known D.haven’t know 查看答案
题型:不定项选择 设m、n是两条不同的直线,α、β是两个不同的平面, ( )A.若m∥α,n∥α,则m∥n B.若m∥α,m∥β,则α∥β C.若m∥n,m⊥α,则n⊥α D.若m∥α,α⊥β,则m⊥β 查看答案