Which of the following is not an arithmetic operator? ( )
A: -
B: +
C: .
D: %
A: -
B: +
C: .
D: %
举一反三
- Which of the following statement is True? A: [img=20x18]1803bd52d74f76c.png[/img] is an eigenvalue of the position operator [img=11x19]1803bd52df60698.png[/img] . B: [img=70x25]1803bd52e788f4d.png[/img] is an eigenfunction of the position operator [img=16x19]1803bd52ef5ee5a.png[/img] C: The position operator [img=11x19]1803bd52f76293f.png[/img] is a linear operator. D: The operator [img=28x18]1803bd5300119fc.png[/img] is a linear operator.
- Which of the following statement concerning about the arithmetic mean is FALSE（） A: It is less than or equal to the geometric mean. B: It is a commonly used measure of central tendency. C: It is equal to the median and mode in symmetric distributions.
- When analyzing investment returns, which of the following statements is correct? A: The geometric mean will exceed the arithmetic mean for a series with non-zero variance. B: The geometric mean measures an investment’s compound rate of growth over multiple periods. C: The arithmetic mean accurately estimates an investment’s terminal value over multiple periods.
- In Britain, education at primary levels emphasizes all the following EXPECT . A: reading B: writing C: arithmetic D: science
- Which statements shall the operator use when the call is put through?