问题
选择题
下列物质中属于氧化物的是
A.O2
B.HCl
C.MgO
D.H2SO4
答案
答案:C
题目分析:O2 是单质;HCl是化合物,不含氧元素;MgO是氧化物;H2SO4 是含氧化合物,但不是氧化物。选C。
点评:氧化物是由两种元素组成,其中一种是氧元素的化合物。
下列物质中属于氧化物的是
A.O2
B.HCl
C.MgO
D.H2SO4
答案:C
题目分析:O2 是单质;HCl是化合物,不含氧元素;MgO是氧化物;H2SO4 是含氧化合物,但不是氧化物。选C。
点评:氧化物是由两种元素组成,其中一种是氧元素的化合物。
小题1:We can _______ on Friday night. A. see a movie B. give books to the library C .come to the Art Festival 小题2:If we want to watch different programs, we may go to the school hall ______. A. on Friday B. on Saturday C. tomorrow afternoon 小题3:There is a basketball game between ______and ______at 4:30 p.m. tomorrow. A. our school; No. 1 High school B. No. 1 High school; No. 3 High school C. our school; No. 3 High school 小题4:We can give old books to the library ________. A. at nine a.m. on Sunday B. at six p.m. on Monday C. at 11:00 a.m. on Friday 小题5:Which of the following is NOT true? A. The basketball game is between our school and No. 2 High School. B. We can go to the movies at 7:30 p. m. on Friday. C. Our friends can come to the Art Festival with us. |