碱度pH0.1mol/LNaOH（）0.1mol/LNH3•H2O（）0.1mol/ 发布时间：2020-01-11 05:44 │ 来源：www.tikuol.com 题型：填空题 问题： 碱度pH0.1mol/LNaOH（）0.1mol/LNH3•H2O（）0.1mol/LNaHCO3（）
题型：填空题 根据对话内容，从方框中的选项中选出能填入空白处的最佳选项。选项中有两项是多余选项。 A: Morning, Jack. You don't look well. 1._________ B: Well, I have got a cold. But it's not serious. Hey, Tom, did you see the movie on CCTV 6 last night.A: No, I didn't. 2._________ B: Harry Potter Ⅲ. It was so exciting. So, what were you doing at that time? A: 3._________ I'm not good at English, yon know. B: But English is not very hard to learn. 4._________ A: Thank you for your advice. 5._________B: It's nearly 7:50. Hurry up, or we'll be late for school. A.You should practice English every day. B.What's it about? C.What is the name of the movie? D.What's the matter with you? E.By the way, what's the time? F.I listened to tapes. G.I was studying English. 查看答案
题型：填空题 Every one of us must know：________we live can we save the earth.A．by changing the way onlyB．only by changing the wayC．by only changing the wayD．by changing only the way 查看答案
题型：填空题 如图3所示为某变压器对称铁芯的示意图。已知此时原线圈ab两端输入交流电压（V），原线圈匝数匝，副线圈匝数匝。则副线圈cd端输出的电压的有效值为（ ）图3A．15VB．30VC．60VD．120V 查看答案
（V），原线圈匝数
匝，副线圈匝数
匝。则副线圈cd端输出的电压的有效值为（ ）