在菱形ABCD中,∠B=120°,周长为14.4cm,则较短的对角线长是( )
A:10.8cm
B:7.2cm
C:3.6cm
D:1.8cm
If you take my _____,you won't tell anyone about it.
如图表示生态系统中的食物网,有关叙述不正确的( )
There will be _______ jobs for people because some robots will do the same jobs as people.