男性，62岁，左侧阴囊肿大2年，检查阴囊肿大呈卵圆形，表面光滑无压痛，囊性感，睾丸触

以下程序运行时若从键盘输入：10 20 30＜回车＞，输出结果是 【10】 。
# include＜stdio.h＞
main()
int i=0,j=0,k=0;
scanf("%d% *d%d",&i,&j,&k);printf("%d %d %d\n",i,j,k);

一负电荷仅受电场力的作用，从电场中的A点运动到B点，在此过程中该电荷做初速度为零的匀加速直线运动，则A、B两点电势φ_A、φ_B及电场强度E_A、E_B之间的关系为（　　）

A．φ_A=φ_B

B．φ_A＞φ_B

C．E_A＜E_B

D．E_A=E_B

该患者胫骨前、后肌，坶长伸肌和趾长伸肌以及腓骨长、短肌肌力均为2级，下列治疗方法中哪项最正确

A．三关节融合术

B．石膏固定术

C．长期穿用矫形鞋

D．全距关节融合术

E．截肢+假肢

(一) Today our knowledge of food and what it does for our bodies are far more advanced than that of the old times. Now we know about vitamins and how each kind of vitamin helps in the growth of a particular, the food that we eat will take care of our body and so there is no need to take any kinds of vitamins unless our doctor tells us that our bodies are short of something which can be supplied by them. Generally speaking, everything we eat does some good to our body. But if we eat too much of one kind of food and pay too little attention to others, we may have too much of one kind and not enough of others. Then we may be in trouble. We are often told that we must eat some meat at each meal in order to get the necessary proteins. That is only partly true, for proteins are not found only in meat. We can also get them from some vegetables. The best advice about what to eat is that we should eat all kinds of food but never too much of any.

The main idea of the second paragraph is that

A．our health will be harmed if we eat everything

B．all kinds of food should be eaten to keep good balance

C．we should eat all kinds of food but not too little

D．we should eat more of some kinds of food than others

下列不属于可燃气体着火爆炸预防措施是（）。

A.在可燃气体的管线上配有氮气

B.对电仪节点进行正压保护

C.对泄漏的可燃气体用惰气进行稀释

D.设消防箱