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【多选题】
元素性质的周期性变化中,金属性的变化规律是()A.
主族元素同主族从上到下金属性增大
B.
主族元素同主族从上到下金属性减小
C.
主族元素同周期从左到右金属性增大
D.
主族元素同周期从左到右金属性减小
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【简答题】Blanks 1 through 4 are based on the following conversation. Complete the form. Write NO MORE THAN THREE WORDS for each answer. What does the man ask the woman to do? To 1______. What does Iaml Wyndham...
【简答题】列车车次号在 白方框中的符号表示车次号,其中 红色, 蓝色。
【单选题】Mammals vary enormously in size, from weighing less than a penny to measuring more than three school buses in length. Some groups of mammals have become very large, such as elephants and whales,【C1】__...
A.
because
B.
while
C.
if
D.
and
【单选题】根据下列文章,请回答 26～30 题。Text 2 More than 30,000 drivers and passengers who sit in the front of the vehicles are killed or seriously injured each year. At a speed of only 30 miles per hour it is the same as...
A.
30,000.
B.
60,000.
C.
Approximately 30,000.
D.
Above 30,000.
【简答题】Blanks 1 through 4 are based on the following conversation. Complete the form. Write NO MORE THAN THREE WORDS for each answer. How long does short memory last? It lasts only 1_____. What is an example...
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