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【单选题】
三相桥式整流电路,在交流电源一个周期里,输出电压脉动( )次。A.
3
B.
4
C.
5
D.
6
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皮皮学刷刷变学霸
举一反三
【单选题】With the development of science, more new technology _______ to the fields of IT. [ ]
A.
has introduced
B.
was introduced
C.
is introduced
D.
is being introduced
【单选题】With the development of science, more new technology _____ to the field of IT. [ ]
A.
has introduced
B.
is being introduced
C.
is introduced
D.
was introduced
【简答题】责备,指责 v,n.
【简答题】请提交第一章课后练习题P10-12
【简答题】请完成课后练习P10-13页language focus 部分习题
【单选题】乙工业企业为增值税一般纳税企业。本月购进原材料200公斤，货款为6 000元，增值税为l020元；发生的保险费为350元，入库前的挑选整理费用为130元；验收入库时发现数量短缺10%，经查属于运输途中合理损耗。乙工业企业该批原材料实际单位成本为每公斤（ ）元。(2006年)
A.
32.4
B.
33.33
C.
35.28
D.
36
【单选题】With the development of science, more new technology ________ to the fields of IT. [ ]
A.
has introduced
B.
is being introduced
C.
is introduced
D.
was introduced
【单选题】The function that broadband technology has on the new digital economy is______.
A.
further
B.
critical
C.
costly
D.
global
【单选题】The new technology has (made possible) for the doctor to (make) diagnoses (without seeing) the patient in (person).
A.
made possible
B.
make
C.
without seeing
D.
person
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