探测 * * 有无狭窄可用()
A.导尿检查
B. * * 扩张术
C. * * 膀胱镜检查
D.经 * * 输尿管肾镜检查
E.经皮肾镜检查
参考答案:B
Of all the subjects, chemistry seems to be _______ for me. [ ]
A. difficult
B. too difficult
C. more difficult
D. the most difficult
一般不起道捣固时,扒道碴应扒至枕底以下()。