如图所示,请将各器材连接成低压调光电路。要求:变阻器的滑片向a端滑动时,灯泡亮度增加。
题目分析:低压调光电路,滑动变阻器和灯泡串联,向a端移动时灯变亮,一定接a的下面接线柱。
Young people usually_______ city life to country life while old people ______ enjoy country life.[ ]
A. would rather; prefer
B. prefer; would rather
C. would rather; would rather
D. prefer; prefer
选择测尘位置时,采样地点设在进风侧。