问题
选择题
下列说法中，正确的是（ ）
A．黄铜是铜锌合金，其熔点比铜高，硬度比铜小
B．rben第1核电站由于氢气泄漏引发爆炸，说明氢气具有可燃性
C．升高温度一定能使饱和溶液变成不饱和溶液
D．在金属铁里，铁既可以显+2价，也可以显+3价
答案
答案：B
搜题请搜索小程序“爱下问搜题”
下列说法中，正确的是（ ）
A．黄铜是铜锌合金，其熔点比铜高，硬度比铜小
B．rben第1核电站由于氢气泄漏引发爆炸，说明氢气具有可燃性
C．升高温度一定能使饱和溶液变成不饱和溶液
D．在金属铁里，铁既可以显+2价，也可以显+3价
答案：B
A: Hi, Jim. How was your weekend? B: Wonderful. __小题1:_ A: Not bad . I phoned you at five o’clock yesterday afternoon . 小题2: B: I was playing ping_pong with my friend at that time. 小题3: A: I was chatting with my friends on the Internet. We talked a lot about the ways of learning English. B: Sounds great ! A: Yes. I phoned you and wanted you to join us. B:小题4:. What did they say about that ? A: One of my friends thinks: First , we should practice listening to English a lot. Then we should speak it out. B: I quite agree . Please let me know next time.. A: 小题5:. Bye . B : Bye .
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