牌号QT表示()
A、球墨铸铁
B、灰铸铁
C、可锻铸铁
D、蠕墨铸铁
参考答案:A
—Where's my soccer ball?
—_____ under the bed. [ ]
A. It
B. Is
C. It's
D. Its
公民的环境权有哪些?