角膜增厚最适宜用哪种技术确诊（）
A.M型超声扫描技术
B.B型超声扫描技术
C.A型超声扫描技术
D.超声生物显微镜
E.以上均不是
参考答案：D
线虫的Ced4在哺乳动物中的同源物是（）
A、Caspase4
B、细胞色素c
C、BCL2
D、Apaf1
The two collections of poems written by William Blake, ______ and ______ hold the similar subject-matter, but the tone, emphasis and conclusion differ.
A. Songs of Innocence; Songs of ExperienceB. Poetical Sketches; Songs of InnocenceC. Poetical Sketches; Marriage of Heaven and HellD. The Book of Urizen; The Book of Los
