【单选题】―She didn’t come to school yesterday, ? ― , though she was not feeling well. [ ]
B.
did she; No, she didn’t
C.
didn’t she; Yes, she did
D.
didn’t she; No, she didn’t
【简答题】如果维持如图所示电路中A 1 的读数不变,而把电源的频率提高一倍,再求电流表A的读数。
【单选题】如图所示电路,如果电阻R=10欧姆,电流I=2A.则
【判断题】纳税人采取以旧换新方式销售货物的,可以从新货物销售额中减除收购旧物所支付的金额。()