A:Jack and John
B:Jack's and John
C:Jack's and John's
D:Jack and John's
下列关于大气垂直分层的叙述,正确的是( )
A: Good morning.____?
B: I'm fine, thank you.____?
A: I'm Gina. Are you Tom?
B: ____.
A: Spell it, please
B: D-A-L-E.
A: ____?
B: Smith.
B: It's 923-8675, and yours (你的)?
A: 841-5643.
发育正常的小雷身高约1.7m,为了准确测量两手伸开的臂展长度,应选用的刻度尺是( )