【简答题】(1)小丽发现盛水的铁锅在与水面接触的部位最易生锈;在擦眼镜时,发现自己铜制眼镜框表面出现了一些绿色物质,他通过查阅资料知道:该物质为铜锈,俗称“铜绿”,主要成分是Cu 2 (OH) 2 CO 3 . 【提出问题】:铜是在什么条件下锈蚀的呢? 【猜想与假设】:根据铜锈的化学式,猜想铜生锈可能是铜与空气中的水、______和______三种物质共同作用的结果. 【实验探究】:借鉴“铁钉锈蚀条件的探究...
【判断题】No one thinks there should be a law requiring drivers and passengers to use safety belts.
【单选题】听力原文:M: Hey, Christine, remember how we were complaining that we wanted to see the drama series but couldn't afford the tickets? I've found a solution. W: Yeah? Won the lottery, huh? M: Huh-uh. But, s...
A.
They had to work during the performance.
B.
They couldn't find time.
C.
They couldn't afford to go.
D.
The tickets were sold out.
【单选题】T hey were ________admission to the military exhibition because they were foreigners. (2003.9/68)
【简答题】阅读理解。 If you were to walk up to Arthur Bonner and say, 'Hey, Butterfly Man,' his face would break into a smile. The title suits him, And he loves it. Arthur Bonner works with the Palos Verdes blue but...
【简答题】If you were to walk up to Arthur Bonnet and say, 'Hey, Butterfly Man,' his face would break into a smile. The title suits him. And he loves it. Arthur Bonnet works with the Palos Verdes blue butterfly...
【单选题】听力原文:A: Hey, John, were you in the literature class yesterday? B: No, I couldn't make it. Weren't you there, either? A: No, I wasn't. I was hoping you could tell me the reading assignment. What do you...
A.
Go to the class at once.
D.
Find out the assignment.