By how much is a signal’s strength reduced when the signal passes through an object thatintroduces 3 dB of attenuation？（）
An oil water monitor is required in order to measure （）.
____assessment is used to measure how the performance of a particular student or group of students with that of another.
A sling psychrometer is used to measure（）.
Magnetic dip is a measurement of the angle between the（）.
Freeboard is measured from the upper edge of the（）.
The pitch of a propeller is a measure of the（）.
Pressure gradient is a measure of（）.
＿ assessment is used to measure how the performance of a particular student or group of students compares with that of another.
Molded depth is measured from the（）.
A pyrometer is an instrument commonly used to measure（）
When oily water separator is operating, which measure （） is wrong.
Variation is the angular measurement between（）.
The （）is used to measure power.
A measurement device for inspecting anchor chain is the（）.
A department head set goals for the subordinate periodically and the subordinate is measured how effectively and efficiently each goal has been attained. The method of performance appraisal is called ______.
We must measure and ________ to determine how much paint will be needed.
EPS is usually measured on a monthly basis.
The instrument for measuring real power is the:
Pressure gradient is a measure of ______.
Quick ratio is used to measure .
When assessing the reliability of a measure, one might be interested in knowing how scores on the measure at one time relate to scores on the same measure at another time. This refers to:
2、导致X线穿过物质时衰减的原因是（） The reason for the attenuation of X-rays through material is（）
Relative measurement method is used when measuring length with percentile meter.（）
