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【多选题】
以下关于模型设定准则的说法正确的是A.
回归方程包含某个变量最重要的准则是理论，而不是统计上的显著性。
B.
回归参数 t 检验不显著的变量不能简单地从方程中剔除。
C.
若变量加入方程后，判定系数 增大，方程应包含该变量。
D.
若变量加入方程，其他变量的系数符号发生改变且不再符合预期，方程不应包含该变量。
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【单选题】— What does the sign over there say? — No person ______ enter the area without the official permission. [ ]
A.
shall
B.
may
C.
must
D.
will
【简答题】What does the sign ______mean?此题出自2015年甘肃兰州中考英语真题及答案,2015年甘肃兰州中考英语试题及答案 What does the sign ______mean? A. No parking. B. No photos. C. No eating. D. No smoking.
【单选题】－ What does the sign over there say? － “No person ____________ bring drinks into the student computer pool.”
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
【简答题】阅读理解。 What does the sign (标识) say? 1. What time does the university park open in March? A. At 6: 00 am. B. At 6: 30 am. C. At 8:00 am. D. At 8: 30 am. 2. Which sign tells you not to smoke? A. Sign 2. ...
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