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【简答题】
以下程序的功能是：对输入的一行字符串的数字字符按它们的字面值累加，输出此累加和。例如，输入一行字符是：ab34dh8u，输出值应当是15。请填空。 include ＜stdio.h＞ include ＜ctype.h＞ main() { char ch； int a，s； 【 】； while((ch=getchar())【 】) if( isdigit (ch)) { a=【 】；s+=a；} printf('s=%d/n/n'，s)；}
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举一反三
【简答题】硝化作用和反硝化作用
【单选题】Advertisements are only read by a small group of people of high social status．
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】Sociologists have long recognized that social tensions are______elements of group life.
A.
average
B.
routine
C.
normal
D.
standard
【单选题】The neuroimaging studies show that shyness is______.
A.
a kind of disability due to differences on the brain
B.
something that only emerges in a child in infancy
C.
something that stays with the person for all his or her life
D.
not a learned behaviour—it is innate
【单选题】The author mentioned the tornado in Edmonton, Canada in order to ______.
A.
explain different types of weather
B.
show that tornadoes occur frequently in Canada
C.
indicate the tornado are common in summer
D.
give an example of a damaging storm
【简答题】比较硝化作用和反硝化作用的区别。
【简答题】请写出硝化过程和反硝化过程的反应式,并比较硝化作用和反硝化作用的异同。
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