Great efforts to increase grain producti

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问题选择题

Great efforts to increase grain production _____ if food shortages are to be avoided. [ ]

A. could be made

B. must be made

C. might be made

D. would be made

答案

答案：B

单项选择题

在棘突间进行穿刺至蛛网膜下隙，错误的是（）

A.可取侧卧和胸膝卧位

B.胸上部穿刺针方向与皮肤角度在60°左右

C.胸下部穿刺针方向与皮肤角度在35°左右

D.穿刺针到达蛛网膜下隙即有脑脊液溢出

E.经过结构：皮肤-浅筋膜-深筋膜-棘上韧带-棘间韧带-硬膜外隙-硬脊膜-硬膜下隙-蛛网膜-蛛网膜下隙

填空题

下列程序的输出结果是______。
#include ＜iostream＞
using namespace std;
int main()

int i=5;
int &r = i;r = 7;
cout＜＜i＜＜endl;
return 0;