根据心绞痛的严重程度可分()
A.4级
B.2级
C.5级
D.3级
E.6级
参考答案:A
Prices began to climb noticeably last year , _____a historical high in November. [ ]
A. hit
B. to hit
C. hitting
D. being hit
当x=3时,多项式ax5+bx3+cx﹣5的值为11,则当x=﹣3时,这个多项式的值为 [ ]
A.11
B.﹣16
C.6
D.﹣21