皮皮学，免费搜题
登录
搜题
【单选题】
原子吸收光谱法中,一般在( )情况下不选择共振线而选择次灵敏线作分析线。 (1) 试样浓度较高 ;(2) 共振线受其他谱线的干扰 ;(3) 有吸收线重叠 ;(4) 共振吸收线的稳定度小
A.
2 、 3
B.
2 、 4
C.
2 、 3 、 4
D.
1、2 、 3 、 4
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
【单选题】-What do you think about That food ? -__________
A.
I didn't have a lot of time to prepare food, so much of my experience comes from eating in restaurants.
B.
A big change was using public transportation in Tokyo.
C.
Overall, the diet there is a healthy one-low fat.
查看完整题目与答案
【单选题】听力原文：M: Hi, Helen, what do you think of our class in children's literature? W: It's pretty good. I was surprised to see you there. Are you also majoring in elementary education? M: No, I'm not, but as...
A.
Art history.
B.
Elementary education.
C.
American literature.
D.
Psychology.
查看完整题目与答案
【简答题】在以下括号中填上“顺式”或者“反式” 1、烯烃与卤素的加成反应是( )加成; 2、烯烃与氢气的加成反应是( )加成; 3、烯烃发生的硼氢化-氧化反应是( )加成。
查看完整题目与答案
【单选题】甲、乙两数的比是3:2,乙数是18,甲数是什么?
A.
12
B.
27
C.
21
D.
30
查看完整题目与答案
【判断题】当反应体系中有少量过氧化物存在时,不对称烯烃与卤化氢发生加成反应得到反马氏规则的产物,这种现象称为过氧化物效应。
A.
正确
B.
错误
查看完整题目与答案
【单选题】在烯烃与卤化氢的加成反应中，卤化氢的反应活性顺序为
A.
HCl＞HI＞HB
B.
HCl＞HI＞HBr＞HF
C.
HBr＞HCl＞HI
D.
HI＞HBr＞HCl
查看完整题目与答案
【简答题】在烯烃与卤化氢的加成反应中， 卤化氢反应最快（HCl，HBr，HI）
查看完整题目与答案
【单选题】W hich one dose Not carry the same meaning with “ yearn to do ”?
A.
long to do
B.
be destined to do
C.
eager to do
D.
dream of doing
查看完整题目与答案
【单选题】在烯烃与卤化氢的加成反应中，卤化氢的反应活性顺序为（）。
A.
HI＞HBr＞HCl
B.
HBr＞HCl＞HI
C.
HCl＞HI＞HBr＞HF
D.
HCl＞HI＞HB
查看完整题目与答案
【单选题】听力原文：Which do you prefer, a pen or a pencil? (A) My pencil needs sharpening. (B) I prefer to write with a pen. (C) This pen writes well. (33)
A.
B.
查看完整题目与答案
相关题目：
【单选题】-What do you think about That food ? -__________
A.
I didn't have a lot of time to prepare food, so much of my experience comes from eating in restaurants.
B.
A big change was using public transportation in Tokyo.
C.
Overall, the diet there is a healthy one-low fat.
查看完整题目与答案
【单选题】听力原文：M: Hi, Helen, what do you think of our class in children's literature? W: It's pretty good. I was surprised to see you there. Are you also majoring in elementary education? M: No, I'm not, but as...
A.
Art history.
B.
Elementary education.
C.
American literature.
D.
Psychology.
查看完整题目与答案
【简答题】在以下括号中填上“顺式”或者“反式” 1、烯烃与卤素的加成反应是( )加成; 2、烯烃与氢气的加成反应是( )加成; 3、烯烃发生的硼氢化-氧化反应是( )加成。
查看完整题目与答案
【单选题】甲、乙两数的比是3:2,乙数是18,甲数是什么?
A.
12
B.
27
C.
21
D.
30
查看完整题目与答案
【判断题】当反应体系中有少量过氧化物存在时,不对称烯烃与卤化氢发生加成反应得到反马氏规则的产物,这种现象称为过氧化物效应。
A.
正确
B.
错误
查看完整题目与答案
【单选题】在烯烃与卤化氢的加成反应中，卤化氢的反应活性顺序为
A.
HCl＞HI＞HB
B.
HCl＞HI＞HBr＞HF
C.
HBr＞HCl＞HI
D.
HI＞HBr＞HCl
查看完整题目与答案
【简答题】在烯烃与卤化氢的加成反应中， 卤化氢反应最快（HCl，HBr，HI）
查看完整题目与答案
【单选题】W hich one dose Not carry the same meaning with “ yearn to do ”?
A.
long to do
B.
be destined to do
C.
eager to do
D.
dream of doing
查看完整题目与答案
【单选题】在烯烃与卤化氢的加成反应中，卤化氢的反应活性顺序为（）。
A.
HI＞HBr＞HCl
B.
HBr＞HCl＞HI
C.
HCl＞HI＞HBr＞HF
D.
HCl＞HI＞HB
查看完整题目与答案
【单选题】听力原文：Which do you prefer, a pen or a pencil? (A) My pencil needs sharpening. (B) I prefer to write with a pen. (C) This pen writes well. (33)
A.
B.
查看完整题目与答案