A:加少量烧碱固体
B:升高温度
C:加少量冰醋酸
D:加少量醋酸钠固体
写出下列词语的近义词。
知道—____ 连连—____
如图所示是照相机的成像示意图,以下说法中正确的是( )
—Did you do well in the math examination yesterday?
—I'm afraid not. Some problems were not as easy as they________.