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【简答题】
Almost every Chinese person can recite the two lines of the famous poem, "Every grain on the plate comes from hard work( 谁知盘中餐 , 粒粒皆辛苦 )." But sadly, many of us don't actually get the real meaning of these lines: Don't waste food. A CCTV program, News One Plus One, reported that the food Chinese people throw away every year is enough to feed 200 million people for a year. Do we have too much food? Of course not. According to the UN World Food Program, there were 925 million hungry people around the world in 2010, especially in developing countries. Six million children die of hunger every year. Chinese people are well known for being hospitable( 好客的 ) and generous. Many even feel that they lose face if their guests have eaten all the food on the table. Luckily, a number of people have realized the importance of saving food. Last November, Li Hong, a waitress in a restaurant in Nanjing, got fired because she took some leftover food home for her son Many people stood by her side and criticized( 批评 ) the waste of food. What should we do in our daily lives to waste less food? Here are some tips: ·Do not order too much in a restaurant. Only order as much as you want to eat. If you cannot eat all the food you ordered, take the rest of it home. ·Don't be too picky( 挑剔的 ) about food. Some food may not taste great, but your body needs it. ·Keep an eye on what food you have at home. Don't buy too much, especially for vegetables and fruit.
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【判断题】在载气流速比较高时,分子扩散成为影响柱效的主要因素。    (    )
A.
正确
B.
错误
【单选题】Navisworks哪个数据格式的文件不包含模型
A.
nwf
B.
nwc
C.
nwd
【单选题】对已确证患有乳腺癌的1000名妇女和未患乳腺癌的1000名妇女,用一乳腺癌筛选的试验检查,结果发现前者有900名为阳性结果,后者有100名为阳性结果。 该试验的特异度是()
A.
90%
B.
30%
C.
25%
D.
12%
E.
10%
【单选题】下列程序段的输出结果是 ________ 。 sum = 0 for i in range(1,4): f = 1 for j in range(1,i+1): f *= j sum += f print(sum)
A.
33
B.
9
C.
4
D.
10
【简答题】阅读以下程序,填写运行结果_______________.def f(m,n): s='' #此处''为空字符串 for i in range(m,n): s+=str(i) return sprint(f(3,5)+f(1,4))
【简答题】阅读以下程序,填写运行结果_____________.def f(n): s='' #此处''为空字符串 for i in range(0,n): s+=str(i) print(s)f(4)
【单选题】程序功能是输出1!+2!+ ……+n! 的值,程序有错误,请指出需要修改第( )行语句。1 n=eval(input('请输入一个正整数:'))2 s=03 f=14 for i in range(1,n):5 f=f*i6 s+=f7 i=i+18 print('{}以内的阶乘和是:{},format(n,s))
A.
1 、 4
B.
4 、 7
C.
1 、 4 、 7
D.
1 、 7
【判断题】加工单元中冲压气缸的初始状态为伸出的。
A.
正确
B.
错误
【单选题】对已确证患有乳腺癌的1000名妇女和未患乳腺癌的1000名妇女,用一乳腺癌筛选的试验检查,结果发现前者有900名为阳性结果,后者有100名为阳性结果。 液试验的灵敏度是( )。
A.
90%.
B.
30%.
C.
25%.
D.
12%.
E.
10%.
【单选题】对已确证患有乳腺癌的1000名妇女和未患乳腺癌的1000名妇女,用一乳腺癌筛选的试验检查,结果发现前者有900名为阳性结果,后者有100名为阳性结果。 该试验的灵敏度是
A.
90%.
B.
30%.
C.
25%.
D.
12%.
E.
10%.
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