皮皮学，免费搜题
登录
搜题
【简答题】
下列关于水体自净过程描述有误的是（ ）。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】write down the Chinese meaning of the phrases undereye shadow
【单选题】The MH370 incident has cast a giant shadow over travel to Malaysia for many Chinese. Another large travel agency, China International Travel Service Head Office, has seen a ____ drop in consumers s...
A.
shallow
B.
sharp
C.
suitable
D.
secure
【单选题】甲购买了A、B、C三种书籍各若干本捐赠给希望小学。其中B书籍比C书籍少了3本，比A书籍多2本；B书籍的单价比A书籍低4元，比C书籍高4元。其购买B书籍的总开销与C书籍相当，比A书籍少4元。问甲购买三种书籍一共用了多少元？
A.
724
B.
772
C.
940
D.
1084 正确答案是D 解析 方程问题。由题意设B书籍的总数为x本，单价为y元；则A书籍总数为（x-2）本，单价为（y+4）元；C书籍的总数为（x+3）本，单价为（y-4）元。由题意列方程组得xy=（x+3）×（y-4），xy=（x-2）×（y+4）-4；解得x=15，y=24。故购买三种书籍一共花了15×24×3+4=1084元。
【单选题】In the ______ movie museum it is recorded that Chinese shadow play is the precursor of worlds' film and cartoons.
A.
American
B.
Italian
C.
French
D.
Chinese
【简答题】名词解释--材料的憎水性：
【单选题】Chinese shadow play reached its highest level in _____.
A.
Ming Dynasty
B.
Song Dynasty
C.
Qing Dynasty
D.
Tang Dynasty
【单选题】In _____ Ma Hong was invited to have a lecture on Chinese shadow boxing in the United States.
A.
1948
B.
1972
C.
1982
D.
1992
【单选题】Chinese shadow puppetry can date its history back to _________.
A.
Han Dynasty
B.
Song Dynasty
C.
Ming Dynasty
D.
Yuan Dynasty
【判断题】Chinese Shadow Play (皮影戏) is widely spread in most regions in China, except Tibet and Xinjiang, with different styles of shadow puppet plays in different places.
A.
正确
B.
错误
相关题目：