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【单选题】
燃烧法是测定有机物组成的常用方法.一定质量的某有机物在足量氧气中充分燃烧只得到二氧化碳和水.根据质量守恒定律判断该有机物的组成正确的是(  )
A.
只含有C、H两种元素
B.
一定含有C、H两种元素,可能含有O元素
C.
含有C、H、O三种元素
D.
一定含有C、0两种元素,可能含有H元素
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举一反三
【单选题】I haven’t seen ________Maggie since I came here.
A.
as lovely a girl as
B.
so a lovely girl as
C.
girl as lovely as
D.
as a lovely girl as
【单选题】I haven’t seen Maggie since I came here.A.as lovely a girl asB.so a lovely girl asC.a girl as lov
A.
32.I haven’t seen          Maggie since I came here. A.as lovely a girl as
B.
so a lovely girl as
C.
a girl as lovely as
D.
as a lovely girl as
【单选题】以法的空间效力、时间效力或对人的效力为依据进行分类的是
A.
成文法和不成文法
B.
根本法和普通法
C.
一般法和特别法
D.
公法和私法
【单选题】执行下面程序段后,a的值为( )。int*p,a=10,b=1;p=&a;a=*p+b;
A.
11
B.
10
C.
12
D.
编译出错
【判断题】气候不好会导致农产品减少,因此一定会使农民农业收入下降。( )
A.
正确
B.
错误
【单选题】豆沙包的制皮方法是( )。
A.
擀皮
B.
压皮
C.
按皮
D.
摊皮
【单选题】豆沙包的制皮方法是( )。
A.
压皮
B.
按皮
C.
摊皮
D.
擀皮
【单选题】The little girl can’t decide ______ though there are so many kinds of MP5 in the mall.
A.
what to choose
B.
to choose which
C.
which to choose
D.
to choose what
【单选题】What's the woman's feeling?
A.
The girl is good.
B.
She didn't see the girl.
C.
She can't agree.
【简答题】数据帧的转发方式有哪三种?
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