下列各数在数轴上的位置是在－2的左边的是
Which of the following numbers lies to the left of-2 on the number line?A．-3B．-2C．－1D． 0
(IG)(CE)Which is colder in each pair of temperatures?(在每一组温度中，哪一个更低?)
a 0℃ or-2℃
b 9℃ or-9℃
C - 4℃ or-12℃
