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【多選題】
真空中有兩個點電荷Q1和Q2，它們之間的靜電力為F，下面哪些做法可以使它們之間的靜電力變為1.5F：( )
A.
使Q1、 Q2的電量分別變為原來的2倍3倍，同時使它們的距離變為原來的2倍
B.
使每個電荷的電量都變為原來的1.5倍，距離變為原來的1.5倍
C.
使其中一個電荷的電量和它們的距離變為原來的1.5倍
D.
保持它們的電量不變，使它們的距離變為原來的2/3倍
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舉報參考答案：
舉一反三
【單選題】Which do you think is the main idea of the second paragraph?
A.
Many of the U. S. presidents had served in the army before they took office.
B.
Only those who didn’t work hard at school but were good at fighting could be presidents.
C.
Grant and Eisenhower became well-known because they both graduated from West Point Military Academy.
D.
Eisenhower was President at the beginning of the Second World War.
【單選題】Which do you think is right about “carnation”?
A.
It has only two kinds of colors.
B.
It refers to the special clothes people wear on Mother’s Day or Father’s Day.
C.
It’s a kind of flower showing love and best wishes.
D.
People can wear carnations only on the second Sunday in May.
【單選題】Which of the following do you think is right according to the last paragraph?
A.
In the U. S. no one wanted to be president because it was tiring.
B.
None of the presidents except Taft could do the tiring job.
C.
It is an important and tiring job to be a president in the U. S.
D.
President Taft didn’t want Roosevelt to be a president because he was too young.
【單選題】What do you know from the passage?
A.
Mother’s Day and Father’s Day are both in May.
B.
Fewer women worked outside the home in the past.
C.
Not all the children respect their parents.
D.
Fathers are not as important as mothers at home.
【單選題】According to Paragraph 1, the author seems to think more about John’s ______.
A.
PE marks
B.
self-confidence
C.
interest in sports
D.
state of health
相關題目：
【單選題】Which do you think is the main idea of the second paragraph?
A.
Many of the U. S. presidents had served in the army before they took office.
B.
Only those who didn’t work hard at school but were good at fighting could be presidents.
C.
Grant and Eisenhower became well-known because they both graduated from West Point Military Academy.
D.
Eisenhower was President at the beginning of the Second World War.
【單選題】Which do you think is right about “carnation”?
A.
It has only two kinds of colors.
B.
It refers to the special clothes people wear on Mother’s Day or Father’s Day.
C.
It’s a kind of flower showing love and best wishes.
D.
People can wear carnations only on the second Sunday in May.
【單選題】Which of the following do you think is right according to the last paragraph?
A.
In the U. S. no one wanted to be president because it was tiring.
B.
None of the presidents except Taft could do the tiring job.
C.
It is an important and tiring job to be a president in the U. S.
D.
President Taft didn’t want Roosevelt to be a president because he was too young.
【單選題】What do you know from the passage?
A.
Mother’s Day and Father’s Day are both in May.
B.
Fewer women worked outside the home in the past.
C.
Not all the children respect their parents.
D.
Fathers are not as important as mothers at home.
【單選題】According to Paragraph 1, the author seems to think more about John’s ______.
A.
PE marks
B.
self-confidence
C.
interest in sports
D.
state of health
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