----Where ____ the dictionary? I can't see it anywhere.

----I ____ it right here. But now it's missing.

A．did you put; have put

B．have you put; put

C．had you put; was putting

D．were you putting; have put

下列关于气温变化的叙述，正确的是[ ]

A．随海拔的升高，气温逐渐升高

B．海拔每升高1000米，气温升高约60℃

C．同纬度地带高原比平原气温低

D．赤道地区从山麓到山顶气温变化小