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【单选题】
磷酸化酶通过接受或磷酸基而调节活性，因此它属于A.
共价调节酶
B.
变构调节酶
C.
诱导酶
D.
同工酶
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反馈参考答案：
举一反三
【简答题】会阴冲洗的病人应取的卧位是
【单选题】Much _____ said about the problem but nothing _____ been done so far .
A.
were，has
B.
is，has
C.
were，had
D.
had been，has
【简答题】So far, almost nothing has been done to ______ the number of vehicles.
【单选题】— How do you like the country life here so far? — ____________.
A.
There is nothing special.
B.
It looks like boring.
C.
It’s too far from the city.
D.
It’s quite different from what I expected.
【单选题】We can surely overcome these difficulties _,___ we are closely united.
A.
so far as
B.
so long as
C.
as soon as
D.
as well as
【单选题】Some ____ on our farm _____to the USA every year.
A.
cattles; are shipped
B.
cattle; are shipped
C.
cattle; are shipping
D.
cattle; is shipped
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