（）is the distance east or west measured in degrees，minutes and seconds of arc on the equator between the prime meridian and the meridian passing through the place.

已知X=21，Y=15，Z=22，计算表达式（（X>Y）or（Y>Z））and（（X<><>

Which WLAN device is often used to make wireless connections between buildings or campuses?（）

Which WLAN device is often used to make wireless connections between buildings or campuses?（）

设x=4，y=8，z=7以下表达式的值是 x＜y And(Not y＞z) Or z＜x

设x=4，y=8，z=7，以下表达式的值是 x＜y And(Not y＞z) Or z＜x

设x=4，y=8，z=7，以下表达式的值是 x＜y And (Not y＞z) Or z＜x

Is y between 1 and 2, exclusive?　　(1) y2 is less than y　　(2) y2+y is between 1 and 2, exclusive

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

Sometimes lights are（）by fog，haze，dust，smoke，or precipitation which may be present at the light，or between the light and the observer，and which is possibly unknown by the observer.

●设AND、OR和NOT分别表示按位与、按位或和按位求反运算，且X=10011011，Y=01111010，Z=11101000，则(NOT(X) AND Y)= (9) ， (Y OR NOT(Z))= (10) 。10011011011110101110100001100000(10)

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。