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【简答题】
By , English words can be grouped into words and borrowed words.
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举一反三
【单选题】The correct description in the following is( ) if a variable is declared in a compound statement in a function
A.
the variable is valid within the compound statement only
B.
the variable is valid in the function
C.
the variable is valid in the program
D.
the variable is invalid
【简答题】The ( ) of an atom is a number that represents the electric charge that the atom would have if the electrons in a compound were assigned to the atoms in a certain conventional way.
【单选题】In a compound, the______element of the compound determines the new word class.
A.
first
B.
second
C.
neither
D.
both
【判断题】The meaning of a compound is the combination of the meanings of the words in the compound.
A.
正确
B.
错误
【简答题】第二次妇女运动开始于20世纪60年代中期,运动的基调就是要消除()。
【简答题】在 的氨性缓冲溶液中，若Al 3+ 和Mg 2+ 的起始浓度均为1.0×10 -2 mol·dm -3 ，问此时能否将两离子定量分离?已知K sp (Al(OH) 3 )=1.3×10 -33 ，K sp (Mg(OH) 2 )=1.3×10 -11 ，K b (NH 3 )=1.8×10 -5 。
【单选题】If a variable is declared in a compound statement within a function, the variable( )
A.
is valid in the compound statement only
B.
is valid in the function
C.
is valid in the program
D.
is an illegal variable
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