检查甲状腺时应注意
A．其大小
B．硬度
C．表面是否光滑，有无结节，压痛
D．两侧是否对称
E．有无震颤
参考答案：A,B,C,D,E
A good story does not necessarily have to have a happy ending, but the reader must not be left __________________.
A．unsatisfying
B．unsatisfied
C．to be unsatisfying
D．being unsatisfied
如图1所示，L1、L2是劲度系数均为k的轻质弹簧，A、B两只钩码均重G，则静止时两弹簧伸长量之和为 ( )
A．3G/k B．2G/k C．G/k D．G/2k
