单项选择题
A．30,000 pounds B．18,000,000 grams C．60,000 ounces D．180,000 kilograms
A．The birth mothers. B．The adopted children. C．The voters. D．All of the abov
A．Kansas, Delaware, and Alabama. B．Delaware, Tennessee, and Alaska. C．Tennessee, Alaska, and Kentucky. D．Oregon, Delaware, and Ohio.