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【判断题】
无粘性土坡的稳定性仅取决于坡角,其值越小,土坡越稳定。
A.
正确
B.
错误
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参考答案:
举一反三
【判断题】在配位阴离子聚合引发剂中,齐格勒-纳塔型引发剂是使用最广的。()
A.
正确
B.
错误
【单选题】Why do some students have to navigate school bureaucracy by themselves?
A.
No one else cares about that.
B.
Their parents don't know English.
C.
Their parents have limited time.
D.
Only students are allowed to do that.
【简答题】简述马斯洛市要层次理论的营销应用。
【单选题】听力原文: Why do some students do better than others? To find out, Reader's Digest invited 2,130 high-school seniors to take a special academic test and then answer a list of personal questions. Among the...
A.
They are more pessimistic than we think.
B.
About four out of five young people are satisfied with their family life.
C.
They work much harder than before.
D.
They are not very confident about their future and the society.
【单选题】下列不是 阴离子聚合引发剂 的是 ( )
A.
氧自由基
B.
碱金属的烷基氧化物
C.
碱金属
D.
弱碱
【单选题】Why do teachers give their students a huge lot of homework and examinations? 查看材料
A.
They have a strong sense of responsibility.
B.
They intend to inspire students' interest in learning.
C.
They are demanded to improve students' scores.
D.
They intend to have students work harder in school.
【判断题】丁基锂是目前常用的阴离子聚合引发剂
A.
正确
B.
错误
【单选题】下列选项中不属于阴离子聚合引发剂的是?
A.
丁基锂
B.
C.
萘钠
D.
AIBN
【单选题】阴离子聚合引发剂或引发体系的原理是
A.
与单体发生亲核反应,属于给电子的亲核试剂
B.
与单体发生亲电反应,属于缺电子的亲电试剂
【单选题】Why do summer schools arrange visits and other activities for the students?
A.
To attract more students.
B.
To make the courses suitable for students of all levels.
C.
To let the students have a good rest.
D.
To help everyone to make new friends, have fun and improve their English.
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