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【单选题】
25 ℃时，在1.0 L浓度均为0.01 mol·L －1 的某一元酸HA与其钠盐组成的混合溶液中测得c(Na ＋ )＞c(A － )，则下列描述中不正确的是（ ）A.
该溶液的pH＜7
B.
HA的酸性很弱，A － 水解程度较大
C.
c(A － )＋c(HA)＝0.02 mol·L －1
D.
n(A － )＋n(OH － )＝0.01 mol＋n(H ＋ )
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举一反三
【单选题】What did the students find out about McKay? 查看材料 A.He trained pilots for some time.###
A.
What did the students find out about McKay? 查看材料 A.He trained pilots for some time.
B.
He lived longer than other pilots.
C.
He died in the Second World War.
D.
He was downed by the pilot Boelcke.
【简答题】简述眼球壁的组成及功能
【单选题】What did the students find out about McKay?
A.
He trained pilots for some time.
B.
He lived longer than other pilots.
C.
He died in the Second World War.
D.
He was downed by the pilot Boelcke.
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