投影法中规定空间点选用字母时应（　） A.
大写字母 B.
小写字母 C.
右上角加一撇的小写字母 D.
右上角加两撇的小写字母

A.法定代表人变更
B.会员大会或者股东大会决定解散
C.章程规定的营业期限届满
D.中国证监会决定关闭

A.压力试验→冲洗消毒→防腐绝热→通水验收
B.防腐绝热→压力试验→冲洗消毒→通水验收
C.防腐绝热→冲洗消毒→压力试验→通水验收
D.压力试验→防腐绝热→冲洗消毒→通水验收

A．consumer surplus is $20 larger than producer surplus.
B．consumer surplus is $40 larger than producer surplus.
C．producer surplus is $20 larger than consumer surplus.
D．producer surplus is $40 larger than consumer surplus.