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【单选题】
Na 2 S 4 O 6 、(NH4) 2 S 2 O 8 中S元素的氧化值分别为( )A.
2.5, 7
B.
2.5, 6
C.
2, 7
D.
2, 6
E.
4, 6
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举一反三
【单选题】卢梭自然主义教育理论中的“消极教育”是指
A.
教育作用有限
B.
教育在等待儿童的成长
C.
教育对儿童发展难以发挥积极作用
D.
教育要遵循儿童本性，防范外界不良影响
【简答题】If youclone an embryo, you can produce valuabl10. If youclone an embryo, you can produce valuable tissues and o_________ that could beused to save human lives.
【简答题】Mobile phones are an important business tool for farmers in rural areas. But they also put a valuable educational tool in their hands. The University of Illinois in the United States has a project cal...
【单选题】The author of the selection believes that eye-movement investigations are ______.
A.
valuable because they provide a picture of the ways the mind works in perceiving word symbols
B.
worthless because eye movements have nothing to do with skillful reading
C.
worthless because they tell us little about how expert readers' functions are
D.
valuable because they tell us much about the way the eye is put together
【单选题】One of the teachers says that their aim is to help _____ students understand they can play a valuable role within _____ society. [ ]
A.
disable; the
B.
disabled; /
C.
disabling; the
D.
disability; /
【简答题】Before the widespread use of computers, managers could not make full use of large amounts of valuable information about a company’s activities. The information either reached managers too late or was ...
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