A:H2O和H2O2的组成元素相同,所以他们的化学性质相同
B:分子可以构成物质,但物质不一定由分子构成
C:盐中含有金属离子和酸根离子,NH4NO3中没有金属离子,不属于盐类
D:酸能使紫色石蕊溶液变红,CO2通入紫色石蕊溶液后溶液变红,所以CO2是酸
下列大洲中,被太平洋、印度洋、大西洋包围的是( )
阅读理解A
Millie:I usually ride my bike to schoo1.It takes me about twenty minutes.Sometimes,my father drives me to school in his car.
ff:My sister Mona and I like running to school.Running is good for us.Usually we leave home at half past seven.Then we get to school at seven fifty.
Alice:I don't like getting up early in the morning.So I have no time for breakfast at home.I usually have it on the school bus.I like my is ride because in the thirty minutes,I can eat my breakfast and walk with my friends.
Mike:My home is ten kilometers from my school.Every morning I
get up early.After breakfast l walk to the subway station.That
takes about ten minutes.Then I take the subway to school.It takes
twenty minutes.