我国大、中型城市医院中发生尿瘘的最常见的原因是
A.盆腔放疗B.产伤C.妇科手术D.膀胱结核E.晚期癌
参考答案:C
At the science museum, the students from Sunshine Middle School got to know_______.
A.what does the spaceship look like
B.what the spaceship looks like
C.How the spaceship looks like
D.how does the spaceship look like
简述清塘的目的及主要方法?