列等式表示:x的4倍与7的和等于20______.
∵x的4倍与7的和等于20,
∴列等式表示为:4x+7=20.
故答案为:4x+7=20.
— Did you see a man in black pass by just now?
— No, sir. I _______ a newspaper.
A.read
B.was reading
C.would read
D.am reading
放射性物品以()中列明的为准。
A.《危险货物品名表》
B.《放射性物品分类和名录》
C.《危险化学品目录》