碳元素的化合价由高到低顺序排列正确的是（ ）
①C60；②CaC03；③CO；④CH4；
A．①②③④
B．①③②④
C．②③①④
D．②④③①
答案：C
导致先天性畸形的常见病毒是（）
A.EBV
B.CMV
C.HSV-1
D.HSV-2
E.HBV
Although the manager felt a little disappointed at her height, she said that what she lacked in height
she could _____ in skill. [ ]
A. dress up
B. turn up
C. make up
D. pick up
