现代医学认为健康是指()。
A.一周内无休工、休学
B.躯体无肢体功能障碍
C.有病即不健康
D.躯体无疾病、心理健康和社会适应良好
E.躯体和心理不感到虚弱
参考答案:D
Last month, the Japanese government expressed their thanks for the aid they ___ from China.
A.receive
B.are receiving
C.have received
D.had received
如图所示,已知电源电压U=6V,闭合开关后,电压表的示数接近6V,L1、L2均不发光,这个电路的故障是[ ]
A.L1的灯丝断了
B.L2灯丝断了
C.L1被短路了
D.L2被短路了