写出下列微粒的符号：
（1） 最外能层电子数是次外能层电子数三倍的原子____________________________；
（2） 与氩原子的电子排布相同，带1个单位负电荷的粒子_______________________；
（3） 与氖原子的电子排布相同，带2个单位正电荷的粒子_______________________。
（1）O
（2）Cl-
（3）Ca2+
| 完形填空。 |
| A: 1 is this bag at the door? Is it 2 , Mr Read? B: No. His bag is 3 , but this one is green. I think 4 Mr Black's. A: Excuse me. Mr Black. Is this 5 yours? C: Oh, yes, it's 6 bag. A: It's so heavy (重的). 7 in it? C: There are 8 T-shits in it. A: T-shirt? 9 colour are they? C: 10 many kinds of colours. |
| ( )1.A. Whose ( )2.A. you ( )3.A. big ( )4.A. it ( )5.A. book ( )6.A. my ( )7.A. What ( )8.A. a ( )9.A. What ( )10.A. It's | B. Who's B. your B. green B. its B. bag B. your B. What's B. some B. What's B. It has | C. Who C. brother's C. black C. it's C. light C. me C. It's C. any C. How many C. How | D. Whose' D. your brother's D. small D. is D. room D. his D. Where is D. isn't D. How D. There are |
