This kind of apple _ delicious. [ ]
A. sounds
B. tastes
C. looks
D. seems
答案:B
绘制巷道贯通设计平面图时,比例尺应不小于()。
A.1:500
B.1:1000
C.1:2000
D.1:5000
某电泳规定通电电流为0.4mA/cm,支持物长10cm宽50cm,电泳仪的输出电流应该为 ()
A.4mA
B.10mA
C.20mA
D.30mA
E.40mA