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问题 填空题
.
x
是平均数，S是标准差，对照计算方差公式，若(x1-
.
x
)2+(x2-
.
x
)2+…+(x8-
.
x
)2=2，则S=______．
答案

∵方差S2=

1
n
[（x1-
.
x
）2+（x2-
.
x
）2+…+（xn-
.
x
）2]，(x1-
.
x
)2+(x2-
.
x
)2+…+(x8-
.
x
)2=2，

∴方差S2=

1
8
×2=
1
4
，

标准差s=

1
4
=
1
2
．

故填

1
2
．

阅读理解
任务型阅读：根据短文内容，填写下面表格。
       This is Alice White. She is from Canada. She is twelve years old. She studies in Fuzhou No.4 Junior High School. She is in Class Eight, Grade Seven.
       Alice looks very cute. She has big eyes and long red hair. She has two brothers. She and her brothers are in the same school but in different grades.
       Alice's favorite food is chicken. She has a pet dog. She likes dogs very much.
Name:   1   From:   2   
Age: TwelveClass:   3   
Grade: SevenSchool: Fuzhou No.4 Junior High School
Favorite food:   4    Her pet:   5   
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单项选择题

下列除哪项外，均是白术的适应证（）。

A.脾胃气虚证

B.脾虚水停之痰饮、水肿小便不利

C.肺肾两虚之喘咳

D.脾虚气弱，肌表不固之汗多

E.脾虚气弱，胎动不安
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