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【单选题】
()的工作原理是通过一个可以发射能量波(一般为脉冲信号)的装置发射能量波,能量波遇到障碍物反射,由一个接收装置接收反射信号,根据测量能量波运动过程的时间差来确定液(物)位变化情况。
A.
超声波液位计
B.
磁浮球液位计
C.
内浮式磁性液位计
D.
磁翻柱液位计
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参考答案:
举一反三
【单选题】He then moved to London, _____ he became famous.
A.
which
B.
when
C.
where
D.
why
【单选题】In 1864, the First International was formed in London. Under the leadership of______, the working class movement developed quickly.
A.
Marx and Engles
B.
George Gordon Byron and Percy Bysshe Shelley
C.
John Milton and Oliver Cromwell
D.
Alfred Tennyson and Robert Browning
【单选题】In London, the police force is under the control of ( ).
A.
London City Mayor
B.
Home Secretary
C.
The Admiralty
【单选题】The expected annual net cash inflow from a project is $22,000 over the next 5 years. The required investment now in the project is $79,310. What is the internal rate of return on the project?
A.
10%
B.
12%
C.
14%
D.
Cannot be determined
【判断题】假设检验有弃真和取伪这两类错误
A.
正确
B.
错误
【简答题】在这白光里,每一个颜色都刺目,每一个声响都难听,每一种气味都混含着由地上蒸发出来的腥臭。街上仿佛已没了人,道路好像忽然加宽了许多,空旷而没有一点凉气,白花花的令人害怕。他不知怎么是好了,低着头,拉着车,极慢地往前走,没有主意,没有目的,昏昏沉沉的,身上挂着一层粘汗,发着馊臭的味儿。走了会儿,脚心和鞋袜粘在一块,好像踩着块湿泥,非常地难过。本来不想再喝水,可是见了井不由地又过去灌了一气,不为解渴,似...
【简答题】简述皮亚杰感知运动阶段儿童心理活动规律。
【单选题】The sentence stress of “He walks in London Street.” is marked as____.
A.
He 'walks in London Street.
B.
He 'walks in 'London `Street.
C.
He 'walks in `London Street.
【简答题】What is the Independent project? The independent project is ______________
【单选题】Visa will introduce a new 'wave and pay' card in London for purchases ______.
A.
under $25
B.
under £10
C.
abroad
D.
in traveling
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