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【多选题】
下面板书点评正确的是( )A.
该过程式板书中. 让学生掌握了余弦定理的扩展内容
B.
该过程式板书中. 让学生了解了余弦定理的内容及证明过程
C.
该过程式板书中，利用余弦定理，逐步推导，层层递进，揭示了问题证明的过程
D.
该过程式板书中，让学生体会到余弦定理的实际应用，而且也让学生体会到数学证明的逻辑严密
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皮皮学刷刷变学霸
举一反三
【单选题】Western nations have older and shrinking populations since they entered the 21st century and their ( ) birth rates have also posed problems.
A.
prejudiced
B.
respective
C.
fluctuating
D.
enlightening
【单选题】. -- What does the sign on the wall read? --“ No person ______ enter it without permission.”
A.
will
B.
may
C.
shall
D.
must
【简答题】— What does the sign over there read? —“No person __________ smoke or carry a lighted cigarette，cigar or pipe in this area.” A．will B．may C．shall D．must
【单选题】—What does the sign over there read? —No person ________smoke or carry a lighted cigarette ,cigar or pipe in this area.
A.
will
B.
may
C.
shall
D.
must
【简答题】永磁同步电动机转子位置检测多用( ) A.光电式转子位置检测器 B、磁电式转子位置检测器 C。绝对式脉冲编码器 D。相对式脉冲编码器
【单选题】— What does the sign over there say? — No person _________ bring drinks into the student computer room.
A.
will
B.
may
C.
shall
D.
must
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