A:The harder, the better
B:the more hard, the more better
C:The harder, a better
D:more hard, more better
①你看,蝴蝶那翩翩起舞的样子,多么像在欢迎前来参观的客人呀!(改为反问句)
②那么多的钱,你还不清呀!(改为反问句)
③蝴蝶在花丛中跳舞。(照样子写一句话)
序号
氢氧化钡溶液的体积/mL
盐酸的体积/mL
溶液的pH
①
22.00
0.00
13
②
18.00
12
③
7
若a=7 ,则 a = ____ ; b的倒数是2,则a+b的值是____ .