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【单选题】
若B药和A药作用于同一受体，A药的内在活性为α（α≠0），而B药的内在活性为β（β≠0，β＜;α），当B药的浓度恒定时，A药处于低浓度时，两药的作用为相加。但随着B药的浓度增加，即使增大A药浓度，效应不见增大，反而越来越小，出现竞争性抑制。B药称为
A.
完全激动剂
B.
部分激动剂
C.
竞争性拮抗剂
D.
非竞争性拮抗剂
E.
反竞争性抑制剂
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举一反三
【单选题】I have ___ to tell you. Maybe you will be _____ in it.
A.
interesting something; interested
B.
something interesting; interesting
C.
something interesting; interested
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【单选题】You must produce 27 widgets. You can only produce 9 widgets per production run. Each production line setup costs $1000. Each widget consumes $10 worth of material and $5 worth of labor. What is the to...
A.
. ￥3,000
B.
. ￥27,000
C.
. ￥27,270
D.
. ￥1,335
E.
. ￥1,000
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【单选题】When you have carefully prepared a blueprint of your abilities and desires, you have something______.
A.
definite to offer
B.
imaginary to provide
C.
practical to supply
D.
desirable to present
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【单选题】在Excel中，若单元格C1中的公式为=A1+B2，将其复制到单元格C5，则C5中的公式是(55)。
A.
=A1+B2
B.
=A5+B6
C.
=A5+B2
D.
=A1+B6
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【单选题】在Excel2000中，设在单元格A1中有公式：=B1+B2。若将其复制到单元格C1中则公式为
A.
=D1+D2
B.
=D1+A2
C.
=A1+A2+C1
D.
=A1+C1
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【单选题】听力原文： Do you know of anyone who uses the truth to deceive? When someone tells you something that is true, but leaves out important information that should be included, he can give you a false picture....
A.
One hundred dollars.
B.
Two hundred dollars.
C.
Three hundred dollars.
D.
Four hundred dollars.
查看完整题目与答案
【单选题】You must produce 27 widgets. You can only produce 9 widgets per production run. Each production line setup costs $1000. Each widget consumes $10 worth of material and $5 worth of labor. What is total ...
A.
. ￥1,020
B.
. ￥1,010
C.
. ￥1,015
D.
. ￥20
E.
. None of the above
查看完整题目与答案
【单选题】“Sorry” is the hardest word to say sometimes. _______ you know you’ve done something wrong, or something inappropriate, it takes courage to say sorry.
A.
Only if
B.
Even if
C.
If only
D.
As if
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【单选题】● 在 Excel中，若单元格 C1 中的公式为=A1+B2，将其复制到单元格C5，则C5 中的公式是 （55） 。 （55）
A.
=A1+B2
B.
=A5+B6
C.
=A5+B2
D.
=A1+B6
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【单选题】在Excel中若单元格C1中公式为=A1+B2将其复制到E5单元格则E5中的公式是().
A.
B367+#REF!
B.
B369+C370
C.
B367+C368
D.
#REF!+A368
查看完整题目与答案
相关题目：
【单选题】I have ___ to tell you. Maybe you will be _____ in it.
A.
interesting something; interested
B.
something interesting; interesting
C.
something interesting; interested
查看完整题目与答案
【单选题】You must produce 27 widgets. You can only produce 9 widgets per production run. Each production line setup costs $1000. Each widget consumes $10 worth of material and $5 worth of labor. What is the to...
A.
. ￥3,000
B.
. ￥27,000
C.
. ￥27,270
D.
. ￥1,335
E.
. ￥1,000
查看完整题目与答案
【单选题】When you have carefully prepared a blueprint of your abilities and desires, you have something______.
A.
definite to offer
B.
imaginary to provide
C.
practical to supply
D.
desirable to present
查看完整题目与答案
【单选题】在Excel中，若单元格C1中的公式为=A1+B2，将其复制到单元格C5，则C5中的公式是(55)。
A.
=A1+B2
B.
=A5+B6
C.
=A5+B2
D.
=A1+B6
查看完整题目与答案
【单选题】在Excel2000中，设在单元格A1中有公式：=B1+B2。若将其复制到单元格C1中则公式为
A.
=D1+D2
B.
=D1+A2
C.
=A1+A2+C1
D.
=A1+C1
查看完整题目与答案
【单选题】听力原文： Do you know of anyone who uses the truth to deceive? When someone tells you something that is true, but leaves out important information that should be included, he can give you a false picture....
A.
One hundred dollars.
B.
Two hundred dollars.
C.
Three hundred dollars.
D.
Four hundred dollars.
查看完整题目与答案
【单选题】You must produce 27 widgets. You can only produce 9 widgets per production run. Each production line setup costs $1000. Each widget consumes $10 worth of material and $5 worth of labor. What is total ...
A.
. ￥1,020
B.
. ￥1,010
C.
. ￥1,015
D.
. ￥20
E.
. None of the above
查看完整题目与答案
【单选题】“Sorry” is the hardest word to say sometimes. _______ you know you’ve done something wrong, or something inappropriate, it takes courage to say sorry.
A.
Only if
B.
Even if
C.
If only
D.
As if
查看完整题目与答案
【单选题】● 在 Excel中，若单元格 C1 中的公式为=A1+B2，将其复制到单元格C5，则C5 中的公式是 （55） 。 （55）
A.
=A1+B2
B.
=A5+B6
C.
=A5+B2
D.
=A1+B6
查看完整题目与答案
【单选题】在Excel中若单元格C1中公式为=A1+B2将其复制到E5单元格则E5中的公式是().
A.
B367+#REF!
B.
B369+C370
C.
B367+C368
D.
#REF!+A368
查看完整题目与答案