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【單選題】
在測定胃蛋白酶活性時，將溶液pH由10降到2的過程中，胃蛋白酶的活性將（ ）
A.
不斷上升
B.
先降后升
C.
先升后降
D.
沒有變化
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舉報參考答案：
舉一反三
【單選題】Jack didn't phone his mother because ______.
A.
he had no phone
B.
he was very busy
C.
his mother had no phone
D.
he went home every day
【單選題】The old Black ______.
A.
is dead
B.
lives with his wife
C.
went to a small village
D.
worked in a shop
【單選題】Jack lived with his mother______he worked in the village.
A.
before
B.
when
C.
after
D.
so
【單選題】We learn from the reading that ______．
A.
Danny was not a good student
B.
Danny's mother talked too much about the school
C.
Danny's teacher knew something about Danny's problem before
D.
Danny wanted to get away from Rick
相關(guān)題目：
【單選題】Jack didn't phone his mother because ______.
A.
he had no phone
B.
he was very busy
C.
his mother had no phone
D.
he went home every day
【單選題】The old Black ______.
A.
is dead
B.
lives with his wife
C.
went to a small village
D.
worked in a shop
【單選題】Jack lived with his mother______he worked in the village.
A.
before
B.
when
C.
after
D.
so
【單選題】We learn from the reading that ______．
A.
Danny was not a good student
B.
Danny's mother talked too much about the school
C.
Danny's teacher knew something about Danny's problem before
D.
Danny wanted to get away from Rick
參考解析：
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