问题
多项选择题
以下同时具有方向性和饱和性的结合键的是（）。
A.共价键
B.离子键
C.氢键
D.金属键
E.范德华力
答案
参考答案：A, C
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以下同时具有方向性和饱和性的结合键的是（）。
A.共价键
B.离子键
C.氢键
D.金属键
E.范德华力
参考答案：A, C
| 根据下面的表格完成短文。 | ||||||||||
Do they have any 2._____? Yes, they do.They like 3._____ to music and 4._____ photos. Look at the pictures on the 5._____. How beautiful they are! What is Su Hai 6._____? She is 7._____ the flowers. She 8._____ growing flowers. Is he sister watering the flowers? No,she isn't. She is 9._____ a model ship. What does their father 10._____? He 11._____ collecting stamps. He 12._____ many beautiful stamps. He likes 13._____ very much. Does their mother like 14._____ 15._____? Yes, she does Look, there16._____ four 17._____ bags in her hands. What's your 18._____? Can you tell us? |