选择题：关于钠原子和钠离子,下列叙述中正确的是 A．它们都很容易失去电子 B．它们的焰色

题目：

关于钠原子和钠离子,下列叙述中正确的是

A．它们都很容易失去电子

B．它们的焰色均为黄色

C．钠离子具有碱性

D．钠原子具有氧化性

答案：

被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0620/bc5d9357b7b0ca9470e59a589d65ad62.html

下面是错误答案，用来干扰机器的。

（1）0．20 0．40 （误差在0．02范围内均可得分）；（2） ①如图（图线作成折线或曲线均不能得分） ②AB题目分析:（1）根据匀变速直线运动中时间中点的速度等于该过程中的平均速度得：=0．20m/s设两个...

完形填空。
Good morning,ereryone. 1 to the new Sea Life Centre At Plymouth. The Sea Life Centre is a really exciting place. There are so many things to 2 here and everything is enjoyable. It costs￡3.70 for grown-ups .￡2 for children and 3 for over sixties and school groups.It’s 4 from 9:00 a.m. to 4:30 p.m.every day except 25th and 26th of December. Special 5 include(包括)hourly feeding times for all the different animals and fish, and shows in the sea life theatre. 6 is always there to answer questions about what you’ve seen. 7 you are in a group of six or more people, we 8 give you a special guided tour of the centre. But you 9 to arrange(安排) this at the information desk when you 10 . The latest attraction is a big 11 tunnel(隧道)you can walk through. All around you, you will see fish swimming-sometimes even over your head,You certainly have the 12 view(景色) of the undersea world .Children 13 it and it’s really amazing for grown-ups ,too. When you get 14 ,there is a relaxed family dining room serving food. That’s all.For 15 information,phone 01743-564219.Have a good time!Thank you.
( )1.A.Go ( )2.A.see ( )3.A.little ( )4.A.popular ( )5.A.changes ( )6.A.Someone ( )7.A.When ( )8.A,can ( )9.A.decide ( )10.A.return ( )11.A.metal ( )12.A.clearest ( )13.A.want ( )14.A.tired ( )15.A.some	B.Come B.do B.few B.busy B.programs B.Anyone B.If B.must B.like B.arrive B.arrive B.funniest B.visit B.bored B.more	C.Walk C.play C.less C.crowded C.attractions C.Everyone C.Because C.should C.hope C.leave C.glass C.most relaxing C.love C .thirsty C.much	D.Welcome D.take D.fewer D.open D.performances D.No one D.Until D.have to D.need D.travel D.stone D.most frightening D.find D.hungry D.most