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【多选题】
建立玉米产量Y对施肥密度F和降雨量R的回归方程，估计结果为【图片】。则以下说法正确的有：A.
常数项-120意味着施肥密度为0时的玉米产量。
B.
若变量F的参数真实值为0.20，则参数估计值-0.10表明OLS估计量是有偏的。
C.
变量F的参数估计值的符号不符合预期，并不影响OLS估计量的BLUE性质。
D.
若方程不满足所有古典假设，变量R的参数真实值也可能等于5.33。
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举一反三
【单选题】皮损表现为多形聚集损害,可于颜面部位见到密集的粉刺、丘疹、脓疱、结节、囊肿及其形成的窦道、瘢痕等,且整个面部表现为凹凸不平,红肿明显属于
A.
寻常型痤疮
B.
结节型痤疮
C.
囊肿型痤疮
D.
聚合型痤疮
E.
中度痤疮
【简答题】书法中的笔画、偏旁、结构都具有抑左扬右的特点。楷书中的横,从来都不是平的,而应该是( )。
【单选题】The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the（）.
A.
Set
B.
Frequency
C.
Period
D.
Function
【单选题】在为患者进行心电监测前,除应对患者周围情况和光照情况进行评估外,还应重点评估
A.
有无电磁波干扰
B.
患者的意识状态
C.
操作者的心理状态
D.
有无声音干扰
E.
患者的心理状态
【判断题】In the fashion industry, the time required to take a new product from design inception to placement in a retail store is known as customer response time.
A.
正确
B.
错误
【单选题】In the immersion technique, the distance between the face and transducer and the test surface (water path) is usually and just so that the time required to send the sound beam through the water
A.
Is equal to the time required for the sound to travel through the test piece
B.
Is greater than the time required for the sound to travel though the test piece
C.
Is less than the time required for the sound to travel though the last piece
D.
None of the above
【单选题】If, in Experiment 2, a 1.5 ×10–6F capacitor had been used, the time required for the voltage across thecapacitor to reach 6 V would have been closest to:
A.
4.2 sec.
B.
7.0 sec.
C.
10.5 sec.
D.
15.0 sec.
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