皮皮学，免费搜题
登录
搜题
【单选题】
下列离子方程式中书写正确的一组是 ①向明矾溶液中加入Ba(OH) 2 溶液至A1 3 ＋ 刚好完全沉淀： Al 3 ＋ ＋ SO 4 2 － ＋3OH － ＋Ba 2 ＋ ='==' BaSO 4 ↓＋ A1(OH) 3 ↓ ②钠和水反应：Na＋H 2 O ='==' Na + ＋OH － ＋H 2 ↑ ③石灰水中加入少量小苏打溶液：Ca 2 ＋ ＋OH － ＋HCO 3 － ='==' CaCO 3 ↓＋H 2 O ④ 氢氧化钠和氯化铵溶液共热：NH 4 ＋ +OH － NH 3 ↑+H 2 O ⑤氢氧化铝与硫酸反应：OH — + H + ='==' H 2 O ⑥在稀硝酸中加入少量的：3Fe+8H + +2NO 3 - = 3Fe 2+ + 2NO↑+4H 2 O -A.
①②③④
B.
③④
C.
①③④⑤
D.
①④⑥
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】听力原文：W: Mike is watching a movie on TV. M: Should he be doing that now with the exams coming up next week? Q: What does the man imply that Mike should be doing? (16)
A.
Studying.
B.
Nothing right now.
C.
Watching television.
D.
Going to the movies.
【单选题】If the price of the capital intensive product rises more than does the price of the land intensive product, then
A.
demand will shift away from the capital-intensive product, and its production will decrease relative to that of the land intensive product.
B.
demand will shift away from the capital-intensive product, and its production will decrease.
C.
the production of the capital-intensive product will decrease, but by less than production of the land-intensive product.
D.
the relative price of the capital intensive product will fall to some point between the pretrade relative prices.
E.
the country that exports the capital-intensive good will lose its comparative advantage.
【单选题】If the price of the capital intensive product rises more than does the price of the land intensive product, then
A.
the relative price of the capital intensive product will fall to some point between the pretrade relative prices.
B.
demand will shift away from the capital-intensive product, and its production will decrease.
C.
demand will shift away from the capital-intensive product, and its production will decrease relative to that of the land intensive product.
D.
the production of the capital-intensive product will decrease, but by less than production of the land-intensive product.
E.
the country that exports the capital-intensive good will lose its comparative advantage.
【单选题】听力原文：M: Nowadays, many people prefer watching TV or surfing on the Internet. W: I guess it is because it is more convenient than going to the cinema. What is meant by the woman's response?
A.
She does not agree.
B.
She tries to tell the truth.
C.
She makes a judgment.
D.
She prefers watching TV.
【单选题】听力原文：W: My suggestion is that if you want to learn English well, watching the news on TV is a good way. M: You're partly right. I think it'll be especially helpful when you check the same information ...
A.
Reading is more helpful than watching TV.
B.
Watching TV is better than reading a newspaper.
C.
A combination of reading and listening is most effective.
D.
The newspaper is a good source for learning English.
【单选题】听力原文：W: Max is watching a football game on TV. M: Should he be doing that now, with an exam coming up? What does he imply that Max should be doing?
A.
Studying.
B.
Watching television.
C.
Nothing right now.
D.
Going to the football game.
【简答题】A:Hi,Susan. What movie are you watching tonight? B: 小题1: It's my second time watching it. A: Man on Wire...Hmm... B: 小题2: A: Yeah, I do. It's a great movie. B: I agree. 小题3: A: Oh, I remember. And it ...
【简答题】关于画家算法的叙述,错误的是( ) A原理比较简单。 B能处理相互穿透的面。 C属于物体空间和图像空间的消隐算法 D画家算法的关键是如何对场景中的物体按深度排序,建立深度优先级表。
【单选题】According to the writer， the responsibility for the kid‘s watching adult television and watching it for a long time should be undertaken by__________. 查看材料
A.
the television stations
B.
the society
C.
TV programs
D.
their parents
相关题目：