一般文献类型标识及取自规定信息源之外的著录信息均置于______内。
参考答案:[ ]
用所给单词的适当形式填空。
1. After the earthquake _______( home) people had nothing to eat.
2. They started at six in the morning and arrived there three hours _______(late) .
3. Which is the _______ ( easy) way to get round the city?
4. The people of that country suffer from_______( hungry) .
5. My parents _______( clean) the house at eight yesterday morning.
设区域D=(x,y)|x2+y2≤2x,则二重积分I=
(xy2+2|y|sinx)dσ=______.