皮皮学，免费搜题
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搜题
【单选题】
呈不规则块状、片状或盔帽状，表面凹凸不平，可见黑褐色树脂与黄白色木部相间的斑纹的药材为A.
苏木
B.
降香
C.
沉香
D.
鸡血藤
E.
大血藤
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】以下对非参数检验的描述，错误的一项是
A.
非参数检验方法不依赖于总体的分布类型
B.
应用非参数检验时不考虑被研究对象的分布类型
C.
非参数的检验效能低于参数检验
D.
一般情况下非参数检验犯第二类错误的概率小于参数检验
E.
非参数检验方法用于分布间的比较
【单选题】His arm is all right. He___ go and see the doctor.
A.
don't have to
B.
haven't to
C.
doesn't have to
【单选题】.—Why, Jack! Someone seems to have called you over there. —Yes? I ________ that.
A.
am not realizing
B.
haven’t realized
C.
didn’t realize
D.
don’t realize
【单选题】His arm is all right. he ____ go and see the doctor.
A.
has not to
B.
don't have to
C.
haven't to
D.
doesn't have to
【单选题】His arm is all right. He_
go and see the doctor.
A.
has not to
B.
don't have to
C.
haven't to
D.
doesn't have to
【单选题】His arm is all right. He _____see the doctor.
A.
must
B.
mustn't
C.
have to
D.
doesn't have to
【单选题】— Why didn't you come and open the door for me, dear? — Sorry, Jack. I _____ in the kitchen and didn't hear you. [ ]
A.
was cooking
B.
am cooking
C.
have cooked
D.
will cook
【简答题】非参数检验(nonparametric test)
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