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【单选题】
设地面B、B′两点间相距80m,水准仪安置在BB′中点时,测得高差hBB′=+0.228m;将水准仪移至离B′点附近15米处,读取B点水准尺上中丝读数=1.666m,B′尺上中丝读数=1.446m,则仪器的i角为( )。A.
+21.4″
B.
-21.4″
C.
+20.6″
D.
-20.6″
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【简答题】土壤凋萎系数(名词解释)
【单选题】What is the perimeter of a rectangle whose length is three times its width and whose area is 12 square centimeters?
A.
18 centimeters
B.
16 centimeters
C.
15 centimeters
D.
8 centimeters
E.
4 centimeters
【简答题】He has expressed a/an__________ to see you.
【简答题】凋萎系数（或凋萎点）
【单选题】The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier. Time (in Minutes) Relative Freq...
A.
1 minute
B.
5 minutes
C.
2%
D.
100%
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