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电压比较器是集成运放( )应用的典型电路,它可分为( )比较器和( )比较器两类。
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举一反三
【单选题】Before the nineteenth century ______.
A.
people got married because they loved each other
B.
people could choose whom they wanted to marry
C.
people married very young
D.
families usually arranged marriages
【单选题】In prehistoric times brachiopods were one of the most abundant and diverse forms of life on Earth: more than 30,000 species of this chainlike creature have been cataloged from fossil records. Today br...
A.
rejecting an earlier explanation for the longevity of certain brachiopod species
B.
reevaluating the implications of uniformity among existing brachiopod species
C.
describing the varieties of environmental change to which brachiopods are vulnerable
D.
reconciling opposing explanations for brachiopods' lack of evolutionary success
【单选题】As is known to all, there are many forms of energy, ______is solar energy.
A.
one of that
B.
one of whom
C.
which of one
D.
one of which
【单选题】To search for work experience or practical learning, one must get ______.
A.
forms OW1 and OW5
B.
forms OW21 and 0W22
C.
forms OW1 and OW21
D.
forms OW5 and OW22
【单选题】Mary said they _____________________with each other for six years before they got married.
A.
has fallen in love
B.
had fallen in love
C.
had been in love
D.
has been in love
【单选题】The best title for this passage would be ______.
A.
How Babies Learn to Speak
B.
Early Forms of Language
C.
A Huge Task for Children
D.
Noise Making and Language Learning
【单选题】属于对会计对象的个体内容进行的基本分类是()
A.
经济活动
B.
资金运动
C.
会计要素
D.
会计科目
【单选题】在主机遥控系统中,若发现遥控系统失灵,首先进行的操作是( )。
A.
关闭气源截止阀
B.
断开遥控系统电源开关
C.
把机旁操纵部位转换阀扳到手控位
D.
把集中控制室转换阀转至机控位
【单选题】在主机遥控系统中,若发现遥控系统失灵,首先进行的操作是( )
A.
关闭气源截止阀
B.
拉开遥控系统电源开关
C.
把机旁操纵部位转换阀扳到手控位
D.
把集中控制室转换阀转至机控位
【单选题】在主机遥控系统中,若发现遥控系统失灵,首先进行的操纵是()
A.
关闭气源截止阀
B.
拉开遥控系统电源开关
C.
把机旁操纵部位转换阀扳到手控位
D.
把集中遥控转换阀转至机控位
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