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阅读理解。 Hands play an important part in our daily life. But do you know which of your two hands you use more? Very few people use both hands equally well. Most of us are right-handed. Only about five people out of a hundred are left-handed. New-born babies can take hold of things with either of their hands, but in about two years they usually use their right hands. Scientists don't know why this happens. Monkeys are our close relatives in the animal world. Scientists have found that monkeys like to use one of their hands more than the other, but it can be either hand. There are as many right-handed monkeys as left-handed ones. Next time you visit a zoo, watch the monkeys carefully, you will see that some of them will use their right hands and others will use their left hands. But most of the people use their right hands better and this makes life difficult for those left-handed people. We live in a right-handed world. 1. How many people among 100 people use their left hands better? A. 5%. B. 50%. C. 95%. 2. What's the meaning of the underlined word 'equally' in Chinese? A. 公正地 B. 均等地 C. 平凡地 3. New-born babies can use __________. A. both of their hands B. neither of their hands C. their right hands 4. Which of the following is true? A. There are more monkeys using their right hands than left hands. B. There are more monkeys using their left hands than right hands. C. There are as many right-handed monkeys as left-handed ones. 5. 'We live in a right-handed world.' means __________. A. Most people use their right hands better. B. Few people use their right hands better. C. Half of the people use their right hands better.
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【单选题】下消化道出血时粪便为( )
A.
黄褐色
B.
鲜血便
C.
黑便
D.
绿色便
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【单选题】判断聚氧乙烯基团的鉴定方法是( )。
A.
亚甲基蓝 - 氯仿试验
B.
浊点试验
C.
泡沫特征试验
D.
磺基琥珀酸酯试验
【简答题】Vet. Choose the best answer (a, b, or c) to complete each of the following statements.
【单选题】Read the passage quickly and choose the best answers. (1) According to the text, after people in Western society complete their compulsory schooling, what are their main choices for further education?
A.
Community college.
B.
VET and university.
C.
Going abroad to study.
D.
All of the above.
【单选题】有如下三个关系模式: 学生(学号,姓名,所属专业) 课程(课程号,课程名,课时) 成绩(学号,课程号,成绩) 则在成绩关系中的外键是( )。
A.
课程号,成绩
B.
学号,课程号
C.
学号,成绩
D.
学号
【单选题】烯键上加成常常是反式加成 , 但是下列加成中哪一种是顺式的 ?
A.
Br2/CCl4
B.
Cl2/OH-
C.
H2/Pt
D.
(1) 浓 H2SO4 ,(2)H2O
【单选题】在以下三个关系模式中: 学生(学号,姓名,性别) 课程(课程编号,课程名称) 学生课程成绩(学号,课程编号,成绩) 学生课程成绩表的主键是:
A.
学号
B.
课程号
C.
学号,课程号
D.
成绩
【单选题】下消化道出血时,粪便颜色为:
A.
白陶土色
B.
暗红色
C.
黄褐色
D.
柏油样
E.
墨绿色
【单选题】在学生选课关系SC(学号姓名,年龄,课程,学分,成绩)中,有: 学号,课程→成绩 学号→姓名,年龄 关系SC最高达到哪级范式?______。 A) 不满足 B) 1NF C) 2NF D) 3NF
A.
B.
C.
D.
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