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【判断题】
在钢筋混凝土和预应力混凝土结构中，也可以用海水拌制混凝土。 （）A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】已知 Sn 4+ /Sn 2+ =0.15V , Cu 2+ /Cu =0.34V , Fe 3+ /Fe 2+ =0.77V , Cl2/Cl - =1.36V 在标准状态下能自发进行的反应是
A.
Cl 2 +Sn 2+ ® 2Cl - +Sn 4+
B.
2Fe 2+ +Cu 2+ ® 2Fe 3+ +Cu
C.
2Fe 2+ +Sn 4+ ® 2Fe 3+ +Sn 2+
D.
2Fe 2+ +Sn 2+ ® 2Fe 3+ +Sn 4+
【单选题】Boy:How do you like your new school? Girl:I’m feeling great in my mew school. There are many interesting subject here. ( ) What’s the girl’s attitude towards her new school life?
A.
Positive.
B.
Pressed
C.
Disappointed
D.
Negative.
【简答题】词形填空。 1. How many ______ (teacher) are there in your school? 2. I have three _______( watch ). 3. There are some _______( orange) on the table. 4. Tom is a little _______ ( strong) than Mike. 5. I thi...
【简答题】How many principles are there in subject-verb concord?
【简答题】In the current economic downturn, many American schools are adding a new subject to the curriculum（课程）; financial literacy. One program in Virginia even gets students out of the classroom for a day to...
【单选题】Boy:How do you like your new school? Girl:I’m feeling in my mew school. There are many interesting subject here. ( ) What’s the girl’s attitude towards her new school life?
A.
Positive.
B.
Pressed
C.
Disappointed
D.
Negative.
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