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【单选题】
对称三相电源中，三相瞬时电动势的代数和____。.A.
总为0
B.
3倍于单相电动势
C.
1/3倍于单相电动势
D.
2倍于单相电动势
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举一反三
【单选题】Most of the books his,but most of the money his wife’s.
A.
are;is
B.
is;are
C.
are;are
D.
is;is
【多选题】楼梯踏步的计算公式常为( ),其中h为踏步高,b为踏步宽。
A.
h+b=600mm
B.
2h+b=600~620mm
C.
h+b=450mm
D.
2h+b=450mm
E.
h+2b=600mm
【单选题】Li Na is _______ tennis player in China now. [ ]
A.
most famous
B.
the most famous
C.
more famous
【单选题】截至目前,世界卫生组织( WHO )对新型冠状病毒的命名是什么? 小知识:新型冠状病毒是指以前从未在人类中发现的冠状病毒新毒株。 2019 年 12 月导致武汉暴发病毒性肺炎的病毒为新型冠状病毒,世界卫生组织将该病毒命名为
A.
SARS-CoV
B.
MERS-CoV
C.
2019-nCoV
D.
SARI
【多选题】楼梯踏步的计算公式常为（ ），其中h为踏步高，b为踏步宽。
A.
h+b＝600mm
B.
2h+b＝600mm
C.
h+b＝450mm
D.
2h+b＝450mm
E.
h+b＝500mm
【单选题】听力原文：Who earned the most money last year? (A) The money is earning interest. (B) The manager earned the most. (C) The students learned English last year. (38)
A.
B.
【简答题】From Li Na's funny reply we now know this.The prize money drove Li Na to win over Wozniacki.A. From Li Na's funny reply we now know what drove Li Na to win over Wozniacki is the prize money.
相关题目：
【单选题】Most of the books his,but most of the money his wife’s.
A.
are;is
B.
is;are
C.
are;are
D.
is;is
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