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【单选题】
Java中对日期数据按照国家和地区的使用习惯进行格式化字符串及日期格式转换,要使用到java.text.SimpleDateFormat类。把日期转换成符合格式的字符串,调用( )方法;把某格式的字符串转换成日期对象,调用( )方法。
A.
parse format
B.
parse dateFormat
C.
format parse
D.
format parseDate
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【单选题】对于下列各对分子,分子间存在的相互作用力类型最多的是:
A.
O 2 和 H 2 O ;
B.
N 2 和 HBr ;
C.
HF 和 H 2 O ;
D.
CO 和 H 2 S 。
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【单选题】下列各组分子中,分子间存在相互作用力类型最多的是()。
A.
Ar 和H 2 O
B.
N 2 和HBr
C.
HF和H 2 O
D.
CO和H 2 S
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【单选题】品牌标志设计要选对色彩,下列哪种颜色可以让人们联想到权威、希望和快乐()
A.
黄色
B.
黑色
C.
红色
D.
白色
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【单选题】对于下列各对分子,分子间存在的作用力类型最多的是
A.
H2O和HF
B.
N2和H2O
C.
Ar和N2
D.
CO和HBr
E.
H2和O2
【单选题】N 2 分子间存在的作用力是 ( )
A.
氢键
B.
取向力
C.
色散力
D.
诱导力
【简答题】Cloze There are 20 blanks in the following passage. For each blank there are four choices marked A, B, C, and D. Choose the one that best fits into the passage. Life is full of constant changes. We go...
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