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【单选题】
有如下程序： #include ＜iostream＞ using namespace std class Sample { friend long fun(Sample s) public: Sample(long a) {x=a} private: long x } long fun(Sample s) { if(s.x ＜ 2) return 1 return s.x * fun(Sample(s.x-1)) } int main() { int stun = 0 for (int i=0 i＜6 i++) {sum += fun(Sample(i))} cout ＜＜ sum return 0 }运行时输出的结果是A.
120
B.
16
C.
154
D.
34
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【单选题】It is important ________ you should try to finish the project within 3 months.
A.
whether
B.
why
C.
how
D.
that
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【单选题】It is important to find a hospital where doctors are experienced ______ patients with cancer.
A.
at treating
B.
to treat
C.
in treating
D.
of treating
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