某同学用显微镜观察他自己制作的临时装片,结果看到的细胞一部分清晰,一部分模糊,这可能是[ ]
A.反光镜未调好
B.显微镜物镜是坏的
C.细准焦螺旋没调好
D.标本做得厚薄不均
答案:D
脑性瘫痪临床表现复杂多样,下列哪一种不是脑性瘫痪
A.早产儿基质出血
B.紧张不安婴儿
C.遗传性痉挛性截瘫
D.先天性婴儿偏瘫
E.先天性舞蹈手足徐动症
The issuance of asset backed securities (ABSs) versus straight debt would be desirable if:()
A. a better credit quality is desired on the asset backed versus the corporation.
B. there are regulatory constraints on the deal.
C. the corporation’s credit rating may go up in the future.