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【单选题】
运算电路可实现函数 Y = aX 1 + bX 2 + cX 3 , a 、 b 和 c 均大于零。A.
反相比例运算电路
B.
同相求和运算电路
C.
积分运算电路
D.
微分运算电路
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反馈参考答案：
举一反三
【简答题】A) still late B) too late C) so late D) past
【简答题】螺纹升角ψ增大,联接的自锁性__,传动效率__;牙型角α增大,则联接的自锁性__,传动效率__。 (供选项:A.提高 B.不变 C.降低)
【单选题】His parents told him not ________. [ ]
A.
be late
B.
to late
C.
to be late
D.
be to late
【单选题】No one except Jack and Tom ________ the meeting.
A.
are late '
B.
were late for
C.
was late for
D.
is late
【单选题】'Late (late, late, late!)nights are the norm' (Para. 5)is closest in meaning to '______.'
A.
She works more efficiently at night
B.
She often reads story books at night
C.
She usually works late into the night
D.
She normally mails packages at night
【单选题】The earthquake happened in ______.
A.
late 1960s
B.
the late of 1960s
C.
late of 1960s
D.
late of the 1960s
【简答题】螺纹升角ψ增大，则联接的自锁性（），传动的效率（）。
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