下列与阮粒无关的疾病是()
A.疯牛病
B.库鲁病
C.亚急性硬化性全脑炎
D.克雅病
E.瘙痒病
参考答案:C
解析:本题主要考查阮粒所致疾病。亚急性硬化性全脑炎主要由麻疹病毒引起。
试述胆囊三角的构成及其中的重要组织结构。
David’s effort was ______, because he won the first prize in the English speech contest, which made his classmates surprised.
A.paid off
B.paid back
C.paid for
D.paid up