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【单选题】
以下( )用来描述工厂方法( Factory Method )模式。
A.
提供一个创建一系列相关或相互依赖对象的接口，而无须指定它们具体的类
B.
表示一个作用于某对象结构中的各元素的操作。它使用户可以在不改变各元素的类的前提下定义作用于这些元素的新操作
C.
定义一个用于创建对象的接口，让子类决定实例化哪一个类。该模式使一个类的实例化延迟到其子类
D.
定义一系列的算法，把它们一个个封装起来，并且使它们可相互替换。本模式使得算法可独立于使用它的客户而变化
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参考答案：
举一反三
【单选题】属于正确的水解反应离子方程式的是（　　）
A.
S 2- +2H 2 O?H 2 S+2OH -
B.
CH 3 COOH+H 2 O?CH 3 COO - +H 3 O +
C.
NH 4 + +H 2 O?NH 3 ?H 2 O+H +
D.
CH 3 COOH+OH - ?CH 3 COO - +H 2 O
查看完整题目与答案
【单选题】The author’s main purpose in writing this article is to
A.
explain how Kimani Maruge was finally able to get an education
B.
compare education in Kenya now with education in Kenya in the past
C.
discuss how important the film The First Grader has been in Kenya
D.
point out the many ways in which Kimani Maruge has served his country
查看完整题目与答案
【单选题】下列水解反应的离子方程式正确的是（　　）
A.
NH 4 + +H 2 O?NH 3 ?H 2 O+H +
B.
S 2- +H 2 O?H 2 S+2OH -
C.
CH 3 COOH+H 2 O?CH 3 COO - +H +
D.
CH 3 COOH+OH - ?CH 3 COO - +H 2 O
查看完整题目与答案
【简答题】4 Complete the dialogues. ► They want us to meet them later this afternoon. ~ Well, in the meantime , let’s go to the market. 1 He’s writing a book, but it’s not finished ____. ~ Yes I know,...
查看完整题目与答案
【单选题】下列离子方程式书写正确的是（　　）
A.
Na 2 S溶液的水解：S 2- +2H 2 O?H 2 S+2OH -
B.
NaHCO 3 溶液的电离：HCO 3 - +H 2 O?H 2 CO 3 +OH -
C.
NH 4 Cl溶液的水解：NH 4 + +H 2 O?NH 3 ?H 2 O+H +
D.
把金属铁放入稀硫酸中：2Fe+6H + =2Fe 3+ +3H 2 ↑
查看完整题目与答案
【简答题】Read and choose.(阅读下面的文章，并回答问题) Today is Sunday. Chen Jie is going to have a picnic with her classmates. She is so excited. But it's windy now. So they can't go out. Chen Jie is sad. She reads books a...
查看完整题目与答案
【简答题】win a place, together with, turn to, break down, run through,flee from, attend a lecture, be known as, put under protection, pour out of1. In the past, Sunday _______ the day of rest, when the shops w...
查看完整题目与答案
【单选题】The film is now out on (DVD).
A.
收音机
B.
数字影碟
C.
电视
查看完整题目与答案
【单选题】下列各式中属于正确的水解反应离子方程式的是（　　）
A.
N H +4 + H 2 O ? N H 3 ? H 2 O+ H +
B.
S 2- +2H 2 O? H 2 S+2O H -
C.
CH 3 COOH+H 2 O? C H 3 CO O - + H 3 O +
D.
C H 3 COOH+O H - ? C H 3 CO O - + H 2 O
查看完整题目与答案
【单选题】下列有关土质路堤填料的要求，错误的是（ ）
A.
腐殖质的土严禁作为填料
B.
泥炭、淤泥、冻土等不得直接用于填筑路基
C.
浸水路堤、桥涵台背和挡土墙墙背宜采用渗水性好的填料
D.
当路基填料强度达不到要求时，不得作为填料适用
查看完整题目与答案
相关题目：
【单选题】属于正确的水解反应离子方程式的是（　　）
A.
S 2- +2H 2 O?H 2 S+2OH -
B.
CH 3 COOH+H 2 O?CH 3 COO - +H 3 O +
C.
NH 4 + +H 2 O?NH 3 ?H 2 O+H +
D.
CH 3 COOH+OH - ?CH 3 COO - +H 2 O
查看完整题目与答案
【单选题】The author’s main purpose in writing this article is to
A.
explain how Kimani Maruge was finally able to get an education
B.
compare education in Kenya now with education in Kenya in the past
C.
discuss how important the film The First Grader has been in Kenya
D.
point out the many ways in which Kimani Maruge has served his country
查看完整题目与答案
【单选题】下列水解反应的离子方程式正确的是（　　）
A.
NH 4 + +H 2 O?NH 3 ?H 2 O+H +
B.
S 2- +H 2 O?H 2 S+2OH -
C.
CH 3 COOH+H 2 O?CH 3 COO - +H +
D.
CH 3 COOH+OH - ?CH 3 COO - +H 2 O
查看完整题目与答案
【简答题】4 Complete the dialogues. ► They want us to meet them later this afternoon. ~ Well, in the meantime , let’s go to the market. 1 He’s writing a book, but it’s not finished ____. ~ Yes I know,...
查看完整题目与答案
【单选题】下列离子方程式书写正确的是（　　）
A.
Na 2 S溶液的水解：S 2- +2H 2 O?H 2 S+2OH -
B.
NaHCO 3 溶液的电离：HCO 3 - +H 2 O?H 2 CO 3 +OH -
C.
NH 4 Cl溶液的水解：NH 4 + +H 2 O?NH 3 ?H 2 O+H +
D.
把金属铁放入稀硫酸中：2Fe+6H + =2Fe 3+ +3H 2 ↑
查看完整题目与答案
【简答题】Read and choose.(阅读下面的文章，并回答问题) Today is Sunday. Chen Jie is going to have a picnic with her classmates. She is so excited. But it's windy now. So they can't go out. Chen Jie is sad. She reads books a...
查看完整题目与答案
【简答题】win a place, together with, turn to, break down, run through,flee from, attend a lecture, be known as, put under protection, pour out of1. In the past, Sunday _______ the day of rest, when the shops w...
查看完整题目与答案
【单选题】The film is now out on (DVD).
A.
收音机
B.
数字影碟
C.
电视
查看完整题目与答案
【单选题】下列各式中属于正确的水解反应离子方程式的是（　　）
A.
N H +4 + H 2 O ? N H 3 ? H 2 O+ H +
B.
S 2- +2H 2 O? H 2 S+2O H -
C.
CH 3 COOH+H 2 O? C H 3 CO O - + H 3 O +
D.
C H 3 COOH+O H - ? C H 3 CO O - + H 2 O
查看完整题目与答案
【单选题】下列有关土质路堤填料的要求，错误的是（ ）
A.
腐殖质的土严禁作为填料
B.
泥炭、淤泥、冻土等不得直接用于填筑路基
C.
浸水路堤、桥涵台背和挡土墙墙背宜采用渗水性好的填料
D.
当路基填料强度达不到要求时，不得作为填料适用
查看完整题目与答案
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