有X、Y、Z三种短周期主族元素，它们在周期表中的位置关系如图，下列有关说法中一定正确的是 （ ）
| A．原子半径大小为：Y>Z>X |
| B．Y与Z形成化合物是离子化合物 |
| C．若Y为金属元素，则X为金属元素 |
| D．若Z的最高价氧化物对应水化物是强酸，则Y元素的最高价氧化物具有两性 |
相关试题
What I need is_____ book that contains ______ABC of oil painting.
| A．a; 不填 | B．the; 不填 | C．the; an | D．a ; the |
Jenny nearly missed the flight______ doing too much shopping.
| A．as a result of | B．on top of | C．in front of | D．in need of |
The CDs are on sale! Buy one and you get ______ completely free.
| A．other | B．others | C．one | D．ones ks |
Progress______ so far very good and we are sure that the work will be finished on time.
| A．was | B．had been | C．has been | D．will be |
粤公网安备 44130202000953号