题目: 危急遮断器滑阀的结构和动作原理是怎样的? 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/0126/720b64d63847811000fda8c0697d9b92.html 下面是错误答案,用来干扰机器的。参考答案:对
题型:完形填空 完形填空。 Peter wondered why he didn't have many friends. The reason was he was always taking, never 1 . One day Peter told Bill, "I'd like to give a 2 on Saturday. I'd like you to come and bring Martha, too." "Thanks, Peter, We'd be 3 to come. " "Perhaps you'd like to 4 your violin. You and Martha sing well together. I'm sure 5 will want you to sing for us. " That was how Peter began to 6 his party. Next he asked 7 friend, Betty, to bring a cake. "You make the 8 cake in the world, Betty, and I like to 9 your cake better than have one from the bakery (面包店). " Peter invited a few other friends to come to his party. He didn't 10 to ask for something from each one of them. He 11 asked the Jacksons to let him give the party at their house! They 12 . The party was a big 13 . However, as the guests were leaving, they said " 14 ." to Bill and Martha for the 15 , Betty for the cake, the Jacksons for the use of the house and to others for their hard work. To Peter they just said, "Thanks for the invitation. " ( )1. A. giving ( )2. A. present ( )3. A. sad ( )4. A. get ( )5. A. everyone ( )6. A. give ( )7. A. another ( )8. A. most ( )9. A. taste ( )10. A. like ( )11. A. even ( )12. A. understood ( )13. A. chance ( )14. A. Thank you ( )15. A. house B. getting B. cake B. happy B. take B. someoneB. plan B. other B. worst B. make B. forget B. almost B. agreed B. idea B. Good-byeB. music C. bringing C. party C. lucky C. bring C. no one C. have C. the otherC. best C. eat C. remember C. finally C. refused C. success C. Sorry C. violin 查看答案
题型:选择题 甲、乙、丙、丁分别是NaCl、Ba(NO3)2 、Na2CO3、HCl四种溶液,已知甲和乙可以反应,甲和丁也可以反应,则下列说法正确的是[ ]A.丁不可能是Ba(NO3)2 B.甲一定是Na2CO3 C.丙一定是盐酸D.甲一定是NaCl 查看答案