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【单选题】
电梯的日常维护保养必须由取得许可的安装、改造、维修单位或者制造单位进行，并每隔______天进行一次。A.
7
B.
15
C.
30
D.
60
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皮皮学刷刷变学霸
举一反三
【单选题】A vegetarian could die from insufficient protein ingestion if he or she ______.
A.
did not follow a varied and properly protein-complemented diet.
B.
ate too many animal proteins, and could not digest them properly.
C.
did not follow a diet in which nonessential proteins were ingested.
D.
ate too many low-quality proteins.
【简答题】征地案例比较测算法
【单选题】已知字母a的ASCII值为97,则执行下列语句后 char a='a'; a--; printf("%d,%c\n",a+'2'-'0',a+'3'-'0'); 的输出结果为:
A.
b,c
B.
格式描述和输出项不匹配,输出无定值
C.
a--运算不合法,故有语法错
D.
98,c
【简答题】订购型腔、型芯材料时,一般是订购( ),订购需要热处理的钢料时,双边需留( )mm的余量。
【简答题】Roommate conflicts are part of manu people's college experiences and can be ________. (stress) 用所给词的适当形式填空
【判断题】people's experiences in their previous relationships can damage their current relationships.
A.
正确
B.
错误
【简答题】Read about three people's experiences of bad jobs. Then look at the statements 1-4 about the three jobs. Which job does each statement refer to (A, B or C)?
【简答题】联氨（N 2 H 4 ）及其衍生物是一类重要的火箭燃料．N 2 H 4 与N 2 O 4 反应能放出大量的热． （1）已知：2NO 2 （g）?N 2 O 4 （g）△H=-57.20kJ?mol -1 ．一定温度下，在密闭容器中反应2NO 2 （g）?N 2 O 4 （g）达到平衡．其他条件不变时，下列措施能提高NO 2 转化率的是______（填字母编号） A．减小NO 2 的浓度B．降低温度...
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