板块构造学说认为,火山、地震多分布在[ ]
A、大陆内部
B、大陆边缘
C、板块内部
D、板块边缘
答案:D
改错。
( ) 1. What do you do yesterday? __________________
A B C
( ) 2. What would you like eat? __________________
( ) 3. Mr. and Mrs. Smith has a daughter. She's Jenny. __________________
( ) 4. How did you went there? __________________
( ) 5. I like to playing football with my cousins. __________________
下列物质中,含有极性共价键的是
(1)N2 (2)H2O (3)CCl4 (4)Na2O2 (5)NaOH (6)Na2O
A.(1)(2)(3)
B.(2)(3)(5)
C.(4)(5)(6)
D.(2)(4)(6)