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【判断题】
若有一个结点是某二叉树子树的中序遍历序列中的最后一个结点,则它必是该子树的前序遍历序列中的最后一个结点。
A.
正确
B.
错误
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参考答案：
举一反三
【单选题】Tourism is the ______ for the country's economy, so its government tries its best to ______ both the natural scenery and the places of interest. [     ]
A.
center; protect
B.
heart; reserve
C.
focus; keep
D.
engine; preserve
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【单选题】下列物质 能进行银镜反应 的是( )
A.
1，2和3
B.
5和3
C.
2，3，6
D.
2和3
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【多选题】按原料的化学性质分,生物质能资源主要包括( )
A.
糖类
B.
淀粉
C.
草质纤维素
D.
木质纤维素
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【判断题】当特征辐射通过试样蒸汽时，被激发态原子吸收
A.
正确
B.
错误
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【单选题】糖类、脂肪和蛋白质是维持人体生命活动必需的三大营养物质。下列说法错误的是
A.
纤维素、淀粉、脂肪、蛋白质都是高分子化合物
B.
淀粉水解的最终产物能发生银镜反应
C.
误食重金属盐而引起的中毒可服用大量豆浆或牛奶进行解救
D.
油脂能发生皂化反应，生成甘油和高级脂肪酸钠
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【单选题】当特征辐射通过试样蒸汽时,被下列哪种粒子吸收
A.
激发态原子
B.
离子
C.
分子
D.
基态原子
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【单选题】常用于反映某病在一定时间 (1 个月、 1 个季度或 1 年 ) 内的病例数占同期人口的比例
A.
发病率
B.
患病率
C.
罹病率
D.
感染率
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【单选题】Which sentence is the best written?
A.
I will now discuss two of the main problems caused by international tourism.
B.
The following are just two of the main difficulties involved with international tourism.
C.
Two of the primary drawbacks associated with this trend are as follows.
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【单选题】Which of the following introduction paragraphs do you think is the best?
A.
Introduction A The bar chart illustrates the changing value in US dollars of tourism to the Egyptian economy between 1982 and 2003. Overall, it is clear that there were both increases and decreases in the amount of money generated by tourism over the period. 42 words
B.
Introduction B The graph shows the contribution of tourism in billions of dollars to the Egyptian economy from 1982 to 2003. Overall, there were higher amounts of money generated by tourism at the end of the period than at the beginning with the lowest in 1982 and the highest in 2000. 49 words
C.
Introduction C The bar chart illustrates the income generated by tourism in Egypt in certain years between 1982 and 2003. Overall, there was a higher income from tourism at the end of the period than at the beginning with an increase in income from 1982 to 2000 followed by a decline. 49 words
D.
Introduction D The bar chart illustrates the income generated by tourism in Egypt in certain years between 1982 and 2003. Overall, there was a higher income from tourism at the end of the period than at the beginning with an increase in income from 0.3 billion dollars in 1982 to a peak of 4.4 billion dollars in 2000 followed by a decline to around 1.7 billion dollars at the end of the period. 71 words
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【简答题】根据下文提供的材料，请代京城公司拟写一份公文。 要求： (1)按照公文正式格式撰写； (2)确定发文范围，正确使用文种； (3)可适当添加内容使之完整。 材料： (1)根据《实施工作目标督查考核暂行办法》，经检查考核和认真评选。培训中心、企划部、销售部、第四分公司被评为2001年度业绩突出部门。 (2)为总结工作经验，表彰自身建设，公司决定评选2001年度政绩突出部门。 (3)经公司董事办公会议，...
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相关题目：
【单选题】Tourism is the ______ for the country's economy, so its government tries its best to ______ both the natural scenery and the places of interest. [     ]
A.
center; protect
B.
heart; reserve
C.
focus; keep
D.
engine; preserve
查看完整题目与答案
【单选题】下列物质 能进行银镜反应 的是( )
A.
1，2和3
B.
5和3
C.
2，3，6
D.
2和3
查看完整题目与答案
【多选题】按原料的化学性质分,生物质能资源主要包括( )
A.
糖类
B.
淀粉
C.
草质纤维素
D.
木质纤维素
查看完整题目与答案
【判断题】当特征辐射通过试样蒸汽时，被激发态原子吸收
A.
正确
B.
错误
查看完整题目与答案
【单选题】糖类、脂肪和蛋白质是维持人体生命活动必需的三大营养物质。下列说法错误的是
A.
纤维素、淀粉、脂肪、蛋白质都是高分子化合物
B.
淀粉水解的最终产物能发生银镜反应
C.
误食重金属盐而引起的中毒可服用大量豆浆或牛奶进行解救
D.
油脂能发生皂化反应，生成甘油和高级脂肪酸钠
查看完整题目与答案
【单选题】当特征辐射通过试样蒸汽时,被下列哪种粒子吸收
A.
激发态原子
B.
离子
C.
分子
D.
基态原子
查看完整题目与答案
【单选题】常用于反映某病在一定时间 (1 个月、 1 个季度或 1 年 ) 内的病例数占同期人口的比例
A.
发病率
B.
患病率
C.
罹病率
D.
感染率
查看完整题目与答案
【单选题】Which sentence is the best written?
A.
I will now discuss two of the main problems caused by international tourism.
B.
The following are just two of the main difficulties involved with international tourism.
C.
Two of the primary drawbacks associated with this trend are as follows.
查看完整题目与答案
【单选题】Which of the following introduction paragraphs do you think is the best?
A.
Introduction A The bar chart illustrates the changing value in US dollars of tourism to the Egyptian economy between 1982 and 2003. Overall, it is clear that there were both increases and decreases in the amount of money generated by tourism over the period. 42 words
B.
Introduction B The graph shows the contribution of tourism in billions of dollars to the Egyptian economy from 1982 to 2003. Overall, there were higher amounts of money generated by tourism at the end of the period than at the beginning with the lowest in 1982 and the highest in 2000. 49 words
C.
Introduction C The bar chart illustrates the income generated by tourism in Egypt in certain years between 1982 and 2003. Overall, there was a higher income from tourism at the end of the period than at the beginning with an increase in income from 1982 to 2000 followed by a decline. 49 words
D.
Introduction D The bar chart illustrates the income generated by tourism in Egypt in certain years between 1982 and 2003. Overall, there was a higher income from tourism at the end of the period than at the beginning with an increase in income from 0.3 billion dollars in 1982 to a peak of 4.4 billion dollars in 2000 followed by a decline to around 1.7 billion dollars at the end of the period. 71 words
查看完整题目与答案
【简答题】根据下文提供的材料，请代京城公司拟写一份公文。 要求： (1)按照公文正式格式撰写； (2)确定发文范围，正确使用文种； (3)可适当添加内容使之完整。 材料： (1)根据《实施工作目标督查考核暂行办法》，经检查考核和认真评选。培训中心、企划部、销售部、第四分公司被评为2001年度业绩突出部门。 (2)为总结工作经验，表彰自身建设，公司决定评选2001年度政绩突出部门。 (3)经公司董事办公会议，...
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