Our new classmate comes __________ Australia.
A:at
B:in
C:on
D:from
下列情况中防止电热危害的是( )
请回答下列问题:
18÷6=____ 3×4= ____ 15÷5=____ 7×7=____
35÷5=____ 2×6=____ 18÷3=____ 5×4=____
24÷4=____ 7×6=____ 24÷6=____ 2×5=____