50平方分米=______平方米
3.8米=______米______分米.
(1)50平方分米=0.5平方米;
(2)3.8米=3米8分米.
故答案为:0.5,3,8.
气球破裂时会发出很响的声音,这是由于空气的______而发出声音,然后声音又通过______传递到人耳中.
The boy is getting ______. [ ]
A. taller and taller
B. more and more tall
C. the taller
D. more taller and taller