下表是元素周期表的短周期部分，表中字母分别表示一种元素。请回答下列问题
（1）f元素在周期表中的位置是第_______周期第________族。
（2）e与f两元素最高价氧化物的水化物相互反应的化学方程式为___________________________
（3）e在空气中燃烧的产物所含化学键的类型为__________、__________。
（4）化合物ca3的电子式为____________，c和d两种元素氢化物的稳定性更强的是_______（填物质的化学式）。
（1）3；IIIA
（2）NaOH+Al(OH)3==NaAlO2+2H2O
（3）离子键；共价键
（4）
；H2O
| 完形填空。 | |||
| Mosquitoes(蚊子)can be seen everywhere all over the world, especially in summer. And there are more than 2,500 kinds of them. __1 _likes the mosquito, but the mosquito may like you. She thinks your blood is delicious. She ? Yes , she. It’s true that the male(雄性)mosquito doesn’t bite and only the female mosquito bites because she 2 blood to lay eggs. She is always 3 things or people she wants to bite. If she likes what she finds, she will bite. But if she doesn’t like your blood, she 4 to someone else for more delicious blood. Next time a mosquito bites you, just remember you’re different from others. If the mosquito likes you, she will land on your body 5 letting you know. She bites you 6 quickly and quietly that you may feel nothing. After she bites, you will have an itch(痒)on your body because she puts something from her mouth together with your blood. By the time the itch begins, she has 7 . And then what happens? Well, after her delicious 8 ,it’s dark. The mosquito feels 9 . She just wants to find a place to have a good rest. There, on a leaf or a wall, she begins to lay eggs, 10 eggs. | |||
| ( )1.A.Everyone ( )2.A.needs ( )3.A.finding ( )4.A.will turn ( )5.A.with ( )6.A.so ( )7.A.flies away ( )8.A.breakfast ( )9.A.tiring ( )10.A.3 hundreds | B. No one B. need B. wants B. turns B. without B. such B. flew away B. dinner B. tired B. hundred of | C. Someone C. want C. looking for C. turn C. after C. very C. flown away C. lunch C. relaxing C. hundreds of | |