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【单选题】
下列有机化合物不属于醇的是()A.
饱和烃分子中的氢原子被羟基取代后的化合物
B.
脂环烃分子中的氢原子被羟基取代后的化合物
C.
芳环上的氢原子被羟基取代后的化合物
D.
芳环侧链上的氢原子被羟基取代后的化合物
E.
烷烃分子中的氢原子被羟基取代后的化合物
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【简答题】简述界定调查问题的基本操作流程。
【单选题】已知集合A={x|x＜0}，B={x|-1＜x＜1}，则A∩B=（ ）
A.
{x|x＜-1}
B.
{x|-1＜x＜0}
C.
{x|0＜x＜1}
D.
{x|x＜1}
【单选题】She hoped to become an engineer, but her mother wanted her to major in law rather than in engineering .
A.
工程
B.
医学
C.
商科
D.
建筑
【简答题】Tom was ten years old, and he was a very lazy boy, He didn't like doing any work. He had to go to school of course, but he didn't study hard there and tried to do as little work as possible. His fathe...
【简答题】Jack was ten years old and he was a very lazy boy. He didn’t like doing any work. He had to go to school, of course, but he didn’t study hard there and tried to do little work. His father and mother w...
【单选题】已知 a =（x，-1）与 b =（1， 1 x ），则不等式 a ? b ≤0的解集为（ ）
A.
{x|x≤-1或x≥1}
B.
{x|-1≤x＜0或x≥1}
C.
{x|x≤-1或0≤x≤1}
D.
{x|x≤-1或0＜x≤1}
【单选题】已知集合A=｛x｜x+1＞0｝，B=｛x｜x 2 -x＜0｝，则A∩B=（ ）
A.
｛x｜x＞-1｝
B.
｛x｜-1＜x＜1｝
C.
｛x｜0＜x＜1｝
D.
｛x｜-1＜x＜0｝
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