题目

R1和R2分别标有“2Ω1.0A”和“4Ω0.5A”，将它们串联后接人电路中，如右图所示，则此电路中允许消耗的最大功率为（ ）A. 6.0 W     B. 5.0 W     C. 3.0 W      D. 1.5 W  答案：D29、 ―Would you mind letting me_________your laptop for another two weeks. ―No problem. A. borrow                   B. keep                      C. lend                   D. bring