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【单选题】
对于对象及其特征的错误理解是 。A.
对象都具有一个标识自己以区别其他对象的名字。
B.
对象都具有自身的属性及其属性值。
C.
对象一般只用数据表示属性，但不用代码表示行为。
D.
对象都具有自身的行为 (操作)。
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反馈参考答案：
举一反三
【简答题】根据例子写单词。 read → reading 1. jump → _________ 3. sit → _________ 5. _________ → looking 2. sleep → _________ 4. sing → _________ 6. _________ → writing
【简答题】熟睡 _______ sleep
【简答题】3. On Saturdays, we
sleep late and eat breakfast together. A. sleep B. eat C.
sleep and eat
【单选题】According to the article, which statement about sleep debt is wrong? ( )
A.
(a) "Sleep debt" is a term created by the author and his colleagues.
B.
(b) The term implies that if you sleep less than you need, you tend to sleep during the daytime.
C.
(c) Sleep debt accumulates day by day and must be paid back.
D.
(d) In reality, lost sleep can be made up by sleeping all day long on weekends.
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