题目

 M 2+离子有2个电子层，则M在周期表的位置是                   （    ）A．第二周期零族                    B．第二周期Ⅷ族   C．第二周期ⅡA族                   D．第三周期ⅡA族   答案： D  用所给单词和短语的正确形式填空。 climate , made up of, cottage , be famous for, in other words , stand for,take place, tear down,  in danger, make fun of, be made from, in fact 1. Great changes have ________ in our hometown sine 1986. 2. ______ you can walk to distant part of the office or factory to check the information.3. The red colour on the flag ________ blood.4. Several years ago, those poor houses was ________ and the central park was built.5. Whenever my friend was ______, I would do whatever I could to help. 6. The powder ________ fish, blood and bones.7. I felt unhappy whenever I was ________.8. He talks a lot, but ________, he does little. 9. China _______ the Great Wall. 10. The villagers used to live in the ______, but now they live in the high buildings happily.