用一根铁丝围成一个长为6米,宽为4米的长方形,现用这根铁丝围成一个正方形,它的边长是多少米?
(6+4)×2÷4,
=10×2÷4,
=20÷4,
=5(米),
答:它的边长是5米.
—Can you work out the maths problem?
—Sorry, I can ______ understand its meaning. [ ]
A. almost
B. quite
C. hardly
D. nearly
中国第一部社会主义类型的宪法是