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【单选题】
受体阻断药与受体 ( )A.
具亲和力，无内在活性
B.
具亲和力，有内在活性
C.
无亲和力，无内在活性
D.
无亲和力，有内在活性
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举一反三
【单选题】Why is juice as fat as fruits? ______
A.
The impact is antioxidant on disease risk may be more important that the amount of fiber.
B.
Whole fruits and vegetable have more fiber than most juices, and fiber has many benefits.
C.
It guarantees you to take in calories, and it help regulate blood sugar.
D.
Some juice companies are extracting the pulp ( which adds to the fiber).
【简答题】一般一个简单控制系统由（）装置、（）、（）器和（）机构组成。
【单选题】The author may agree ______.
A.
special hardware interfaces are often built into I/O devices
B.
a modern computer system demonstrates its power through hardware resources
C.
processors and memory are the two most important peripheral devices of a computer
D.
software interface programs are quite different from network communication programs
【单选题】Standage suggests that tea may have been more responsible than rum for the independence movement in Britain' American colonies.
A.
Y
B.
N
C.
NG
【单选题】Standage suggests that tea may have been more responsible than rum for the independence movement in Britain's American colonies.
A.
Y
B.
N
C.
NG
【单选题】单回路控制系统的构成、主要特点及其应用场合,下面哪种说法不正确?
A.
由被控对象、测量变送装置、控制器、执行器四个基本环节组成
B.
结构简单、投资少、易于调整、投运、又能满足一般生产过程的工艺要求
C.
只对一个被控参数（被控量）进行控制的单闭环反馈控制系统
D.
适用于被控过程的纯滞后与惯性大、负荷与干扰变化大或者工艺要求高的场合
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