Just as exercise helps _______our bodies
题型：选择题
问题：
Just as exercise helps _______our bodies, reading helps _____ our mind, broadening our vision into
the world [ ]
A. found; found
B. to put up; to put up
C. to build up; to build up
D. to set up; to set up
sin100πt （V）的 正弦交流电源，图中电流表内阻不计．副线圈接入“110V，60W”灯泡一只，且灯光正常发光．下列说法正确的是（ ）
/22 A