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读“北半球某森林带分布上限与经纬度的关系图”，读图回答1~2题。 1．形成该森林分布高度逐渐变化的主要因素是 [     ] A．热量 B．水分 C．光照 D．地形 2．下列关于该森林带的说法正确的是 [     ] A．该森林带在亚欧大陆分布的，大陆东部比西部偏北 B．该森林带在全球范围内的高纬度地区广泛分布 C．该森林带主要分布区是世界现存面积最大的天然林区 D．该森林带主要位于俄罗斯、加拿大、中国等国
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举一反三
【单选题】The scientists' attitude towards the study published in the journal science is
A.
skeptical.
B.
enthusiastic.
C.
astonished.
D.
indifferent.
查看完整题目与答案
【单选题】The new study published online focuses on the effects of cocoa flavanols on______.
A.
weight
B.
blood pressure
C.
memory
D.
heartbeat
查看完整题目与答案
【单选题】Which of the following is true of the study published in the Journal of Genetic Counseling?
A.
It suggests kids of first cousins suffer from heart defects.
B.
It was funded by its lead author Robin Bennett.
C.
It will change people’s opinion of cousin marriages.
D.
It has lifted the medical ban and removed the social stain.
查看完整题目与答案
【单选题】According to reports in major news outlets, a study published last week included a startling discovery: the nation's Jewish population is in shrinking. The study, the National Jewish Population Survey...
A.
It found a decline of 300,000 Jews in ten years.
B.
It was carded out by United Jewish Communities.
C.
This is the first time United Jewish Communities has made mistakes in the population survey.
D.
The reported decline is not reliable.
查看完整题目与答案
【单选题】A study published shows that only _______ of boys and _______ of girls feel comfortable using standard English.
A.
32%, 23%
B.
22%, 43%
C.
22%, 28%
D.
28%, 22%
查看完整题目与答案
【简答题】国家环保总局“环境监测公报”指出，减少SO 2 的排放和生活废水的处理是 我国“十一五”期间环境保护的主要任务．请回答下列问题： （1）SO 2 的排放是造成酸雨的主要因素．某地区酸雨pH随时间的变化如右图所示．请用化学方程式表示该地区酸雨pH随时间增加而减小的原因______． （2）新型氨法烟气脱硫技术采用氨吸收烟气中SO 2 生成亚硫酸铵和亚硫酸氢铵，再用一定量的磷酸进行反应回收SO 2 ，...
查看完整题目与答案
【简答题】（1）某建筑材料，主要成分为铝硅酸盐，化学式是MgAl 2 H 4 Si 4 O 14 ；化学式改写成氧化物形式为______．该材料与酸或碱反应时可以看作各氧化物分别与酸、碱反应，则材料该与足量的氢氧化钠反应后过滤，滤渣主要是______． （2）除去FeCl 2 溶液中少量的FeCl 3 最好加入______物质． （3）鉴别Na 2 CO 3 和NaHCO 3 溶液可选用______（填序号...
查看完整题目与答案
【简答题】The study, published in the current issue of the Journal of Experimental Education, found significant increase in ninth-grade math test scores among students who had spent early grades in smaller clas...
查看完整题目与答案
【简答题】化学是一门以实验为基础的科学。利用图中仪器和装置回答下列问题。 ①排空气法收集氢气可以选用的装置编号是___________。 ②实验室制取的CO 2 中常混有HCl气体，为除去CO 2 中少量的HCl气体，不纯的气体应从E装置__________（填写导管口英文编号）管口进入，若用E装置干燥CO 2 ，则装置内所加试剂是_____________。 ③SO 2 和Cl 2 均有毒有害，实验室可将...
查看完整题目与答案
【多选题】下列何种表现应看作为中毒患者危重的信号
A.
昏迷
B.
情绪激动
C.
脉搏增快
D.
肺水肿
E.
心律失常
查看完整题目与答案
相关题目：
【单选题】The scientists' attitude towards the study published in the journal science is
A.
skeptical.
B.
enthusiastic.
C.
astonished.
D.
indifferent.
查看完整题目与答案
【单选题】The new study published online focuses on the effects of cocoa flavanols on______.
A.
weight
B.
blood pressure
C.
memory
D.
heartbeat
查看完整题目与答案
【单选题】Which of the following is true of the study published in the Journal of Genetic Counseling?
A.
It suggests kids of first cousins suffer from heart defects.
B.
It was funded by its lead author Robin Bennett.
C.
It will change people’s opinion of cousin marriages.
D.
It has lifted the medical ban and removed the social stain.
查看完整题目与答案
【单选题】According to reports in major news outlets, a study published last week included a startling discovery: the nation's Jewish population is in shrinking. The study, the National Jewish Population Survey...
A.
It found a decline of 300,000 Jews in ten years.
B.
It was carded out by United Jewish Communities.
C.
This is the first time United Jewish Communities has made mistakes in the population survey.
D.
The reported decline is not reliable.
查看完整题目与答案
【单选题】A study published shows that only _______ of boys and _______ of girls feel comfortable using standard English.
A.
32%, 23%
B.
22%, 43%
C.
22%, 28%
D.
28%, 22%
查看完整题目与答案
【简答题】国家环保总局“环境监测公报”指出，减少SO 2 的排放和生活废水的处理是 我国“十一五”期间环境保护的主要任务．请回答下列问题： （1）SO 2 的排放是造成酸雨的主要因素．某地区酸雨pH随时间的变化如右图所示．请用化学方程式表示该地区酸雨pH随时间增加而减小的原因______． （2）新型氨法烟气脱硫技术采用氨吸收烟气中SO 2 生成亚硫酸铵和亚硫酸氢铵，再用一定量的磷酸进行反应回收SO 2 ，...
查看完整题目与答案
【简答题】（1）某建筑材料，主要成分为铝硅酸盐，化学式是MgAl 2 H 4 Si 4 O 14 ；化学式改写成氧化物形式为______．该材料与酸或碱反应时可以看作各氧化物分别与酸、碱反应，则材料该与足量的氢氧化钠反应后过滤，滤渣主要是______． （2）除去FeCl 2 溶液中少量的FeCl 3 最好加入______物质． （3）鉴别Na 2 CO 3 和NaHCO 3 溶液可选用______（填序号...
查看完整题目与答案
【简答题】The study, published in the current issue of the Journal of Experimental Education, found significant increase in ninth-grade math test scores among students who had spent early grades in smaller clas...
查看完整题目与答案
【简答题】化学是一门以实验为基础的科学。利用图中仪器和装置回答下列问题。 ①排空气法收集氢气可以选用的装置编号是___________。 ②实验室制取的CO 2 中常混有HCl气体，为除去CO 2 中少量的HCl气体，不纯的气体应从E装置__________（填写导管口英文编号）管口进入，若用E装置干燥CO 2 ，则装置内所加试剂是_____________。 ③SO 2 和Cl 2 均有毒有害，实验室可将...
查看完整题目与答案
【多选题】下列何种表现应看作为中毒患者危重的信号
A.
昏迷
B.
情绪激动
C.
脉搏增快
D.
肺水肿
E.
心律失常
查看完整题目与答案