喉内肌包括:()
A.环杓后肌
B.环杓侧肌
C.环甲肌
D.甲杓肌
E.杓会厌肌
参考答案:A, B, C, D, E
下图是用伏安法测量小灯泡电阻所要的器材:
(1) 请连好实物电路,要求滑片P向B端移动时灯泡变亮,并画出相应的电路图;
(2)闭合开关之前,滑片P应移至___________(填A或B端);
(3)小华在做该实验时,观察到电流表的示数变大时,电压表的示数减小,其原因可能是______________________;
(4)本实验中滑动变阻器的作用是___________ ___________。
It was the news that two lions had run away from the zoo that ________ the local people.[ ]
A.delighted
B.alarmed
C.satisfied
D.inspired