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【单选题】
以下定义对表1+2+3+。。。+n求值的函数sum(),请在【?】填上适当的代码 int sum(int n) /* 函数定义 */ { int s,i; for(s=0,i=1;i<=n;i++) 【?】 return s; }A.
s +=i;
B.
s =i;
C.
s +i=s;
D.
s =i+1;
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【单选题】The website of China Railway Customer Service Center only has version.
A.
Chinese
B.
Spanish
C.
English
D.
Japanese
【简答题】CRH (China Railway High-speed)
【判断题】China railway is developing very quickly to meet the demand of its economic development.
A.
正确
B.
错误
【单选题】China Railway Express, or briefly called as ______ , is the China-Europe fast-track cargo railway.
A.
CR Express
B.
CRE
C.
C Express
D.
R Express
【单选题】Lost China rail tickets do not mean lost seats. Passengers who lost their tickets can reclaim the seat/sleeper at the railway station or onboard. The service fee by China Railway Corporation is CNY（ ...
A.
2
B.
3
C.
5
D.
0
【单选题】The China Railway Tunnel Group has spent three years ____ that tunnel in Uzbekistan
A.
to build
B.
built
C.
building
D.
build
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