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设有如下说明： typedef struct int n； char c；double x；STD；则以下选项：能正确定义结构体数组并赋初值的语句是( )。

A. STDtt[2]=1,'A',62,2,'B',75;
B. STDtt[2]=1,"A",62,2,"B",75;
C. struet tt[2]= 1,'A',2,'B';
D. struct tt[2]=1,"A",62.5,2,"B",75.0;

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The author thinks that pull factors______. A) are all related to economic considerations C) include a range of considerations B) are not as decisive as push factors D) are more important than push factors

A. The author thinks that pull factors______.
B. are all related to economic considerations
C. are not as decisive as push factors
D. include a range of considerations
E. are more important than push factors

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下列物质能混放的是( )。

A. 高氯酸与乙醇
B. 碳酸钠与氢氧化钠
C. 硝酸钾与醋酸钠
D. 高锰酸钾与硫酸

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78（）

A. or
B. except
C. while
D. but

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以下对结构体类型变量td的定义中，错误的是( )。

A. typedef struct aa
B. int n；
C. float m；
D. AA；
E. AA td；
F. struct aa
G. int n；
H. float m；
I. td；
J. stmct aa td；
K. stmct
L. int n；
M. float m；
N. aa；
O. stmct aa td；
P. struct
Q. int n；
R. float m；
S. td；

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设有如下说明： typedef struct int n； char c；double x；STD； 则以下选项：能正确定义结构体数组并赋初值的语句是( )。

A. STDtt[2]=1,'A',62,2,'B',75; B. STDtt[2]=1,"A",62,2,"B",75; C. struet tt[2]= 1,'A',2,'B'; D. struct tt[2]=1,"A",62.5,2,"B",75.0;

The author thinks that pull factors______. A) are all related to economic considerations C) include a range of considerations B) are not as decisive as push factors D) are more important than push factors

下列物质能混放的是( )。

78（）

以下对结构体类型变量td的定义中，错误的是( )。

设有如下说明： typedef struct int n； char c；double x；STD；则以下选项：能正确定义结构体数组并赋初值的语句是( )。

A. STDtt[2]=1,'A',62,2,'B',75;
B. STDtt[2]=1,"A",62,2,"B",75;
C. struet tt[2]= 1,'A',2,'B';
D. struct tt[2]=1,"A",62.5,2,"B",75.0;