— Well, they have set out to deal with the present situation ________ they think deserves their immediate attention.
A:what
B:where
C:when
D:which
近年来,山东省大力调整农业结构,发展冬季蔬菜大棚生产,为京津地区提供大量蔬菜。据此完成下列问题。
写出下列词语的近义词。
巩固____ 突破____ 顽强____ 歼灭____
对于△ABC,有如下四个命题: ①若sin2A=sin2B ,则△ABC为等腰三角形,②若sinB=cosA,则△ABC是直角三角形③若sin2A+sin2B<sin2C,则△ABC是钝角三角形其中正确的命题个数是 ( )