Nobody can be successful in everything in life. In other words, you might fail ________ others succeed or the other way around.
A:where
B:since
C:although
D:unless
参照图示中一些常见物质的pH进行判断,下列说法正确的是( )
日常生活中应节约能源,下列符合节能做法的是( )
①草 ②家鸽 ③珊瑚 ④钟乳石 ⑤冬眠的蛇 ⑥恐龙化石 ⑦蘑菇