热导检测器是根据载气中混入其他气态物质时,其热导率不发生变化的原理制成的。()
参考答案:错
根据句意及汉语提示,完成句子。
小题1:Unfortunately, my car ______ down when I went home.(抛锚)
小题2:He looked at me in ______. (惊讶)
小题3:_______ (安全) is important.
小题4:Have you ____ of the romantic tale? (听说)
小题5:In his ______ (三十),he began to teach.
下列物质中,日本进口比例最小的是[ ]
A.石油
B.铁矿石
C.棉花
D.木材