短胚基模式
参考答案：胚胎发育中除了尾端以外，中间体节的部分是以原基的形式首先出现在前部，然后原基从前向后不断依次分化出各体节来，如蚱蜢。
为避免漏检，血检疟原虫应采取（）
A.厚血膜为主
B.薄血膜为主
C.薄血膜3片法
D.从耳垂取血
E.厚、薄血膜都可以
—Mum, could you buy me a dress like this?
—Certainly, we can buy _____ one than this, but _____ this. [ ]
A. a better; better than
B. a worse; as good as
C. a cheaper; as good as
D. a more important; not as good as
