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【单选题】
Directions: For each question, there are four choices marked A, B, C, and D. You should choose the best answer.Passage1 There is a definite possibility that the climate of the world may be changing. Some scientists imagine that this could even mean the beginning of another ice age. The effects of such a change in climate on the human population of the world would be startling. Recent research suggests that the general warming tend of the past hundred years or so may be coming to an end. During the past ten years, meteorologists tell us the average temperature of the earth has dropped about one degree Fahrenheit. This does not seem like much, but it could have effects on wind and rain patterns which influence the overall weather picture. If these patterns change a lot, it could mean that certain regions of the world may continue to have long droughts while others will possibly suffer from widespread flooding. What regulates the climate is not exactly known. Meteorologists believe that clouds may be an important factor in regulating the amount of solar heat held by the earth, which in turn determines the temperature of the planet. Another possibility is that man’s industrial and agricultural methods may be affecting the natural weather patterns. However, the weather is not understood well enough for scientists to say for certain what is happening to the climate and what side effects this will actually have on the word’s population. Question: Accordingtosomescientists,theclimateoftheworldseemsto.
A.
be getting colder
B.
be getting warmer
C.
remain the same in the past ten years
D.
have good effects on the world’s population
E.
be getting hotter
F.
be getting bad
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【单选题】要调节直流发电机的电动势通常采用()方法。
A.
调节电枢电流
B.
改变磁极对数
C.
调节励磁电流
D.
改变励磁方式
【单选题】第 20 题(本题:1分) 有以下程序 #include main() { int y=10; while(y--); printf("y=%d\n", y); } 程序执行后的输出结果是
A.
y=0
B.
y=-1
C.
y=1
D.
while构成无限循环
【多选题】直接材料实际成本与计划成本之间产生差异的原因有( )。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
用量偏离标准 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
B.
价格偏离标准 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
C.
实际工时偏离计划工时 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
D.
实际每小时工资成本偏离计划每小时工资成本 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
【单选题】第 20 题(本题:1分) 若有以下程序 #include main() { int a=-2, b=0; do { ++b ; } while(a++); printf("%d,%d\n", a, b); } 则程序的输出结果是
A.
1,3
B.
0,2
C.
1,2
D.
2,3
【单选题】第 20 题(本题:1分) 有以下程序 #include main() { int a = 7; while ( a-- ) ; printf ("%d\n", a); } 程序运行后的输出结果是
A.
0
B.
-1
C.
1
D.
7
【简答题】某企业丙产品采用定额法计算产品成本。该产品的生产只耗用一种原材料,原材料在生产开始时一次性投入。与丙产品有关的资料如下: (1)本月开始实行新的原材料消耗定额,直接材料消耗定额由原来的20千克降到18千克;直接材料的计划单价不变,仍为每千克20元。 (2)月初在产品100件,直接材料定额费用为40000元,脱离定额的差异为节约4400元。 (3)本月投产1000件,直接耗用材料18418千克。 (...
【单选题】第 20 题(本题:1分) 有以下程序 #include main() { int a = -2, b = 0; while (a++ && ++b) ; printf("%d,%d\n", a, b ); } 程序运行后输出结果是
A.
0,2
B.
0,3
C.
1,3
D.
1,2
【单选题】第 20 题(本题:1分) 有以下程序 #include main() { int y=10; while(y--); printf("y=%d\n",y); } 程序执行后的输出结果是
A.
y=-1
B.
y=0
C.
y=1
D.
while构成无限循环
【单选题】第 20 题(本题:1分) 若有以下程序 #include main() { int a=-2, b=0; while(a++) ++b ; printf("%d,%d\n", a, b); } 则程序的输出结果是
A.
1,2
B.
0,2
C.
1,3
D.
2,3
【单选题】以下描述不正确的是:
A.
用人为方法使电动机在同样的负载下得到不同的转速,叫做调速。
B.
直流电动机极掌的作用是使空气隙中的磁感应强度分布达到设计要求。
C.
直流电动机所用的直流电可以用交流电变换得到。
D.
直流电动机的转子与交流电动机的转子结构相同。
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