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【多选题】
关于主偏角的选择原则，下面叙述正确的有（）。A.
加工台阶轴时，主偏角应等于或大于90。
B.
加工台阶轴时，主偏角应等于或小于90。
C.
当工件的刚性较差时，主偏角较大值
D.
当工件的刚性较差时，主偏角较小值
E.
当车削硬度较高的工件时，较大的主偏角
F.
当车削硬度较高的工件时，较小的主偏角
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【简答题】请按照题目的要求编写程序并给出运行结果。 请编写程序,实现计算“1+3+5+7+...+99”的值。 提示: 使用循环语句实现自然数1~99的遍历。 在遍历过程中,通过条件判断当前遍历的数是否为奇数,如果是就累加,否则不加。
【单选题】According to the passage, what helps to explain why the population problem has come on 'all of a sudden'?
A.
The penny that doubles itself every day for one month
B.
The time span of at least two million years in human history
C.
An illustration of the exponent growth rate given by the author
D.
The large amount of money you would luckily make after the fourth week
【简答题】下列那个意象语汇和南京题材的咏史怀古诗歌无关？
【单选题】用人单位可以随时单方解除劳动合同的是（ ）。
A.
劳动者同时与其他用人单位建立劳动关系，对完成本单位的工作任务造成严重影响
B.
劳动者不能胜任工作，经过培训或者调整工作岗位，仍不能胜任工作
C.
劳动者患病或者非因工负伤，在规定的医疗期满后不能从事原工作
D.
单位由于经营不善等经济原因，一次性辞退部分劳动者
【简答题】According to the passage, what helps to explain why the population problem has come on 'all of a sudden'? A) The penny which doubles itself every day for one month. B) The time span of at least two mi...
【单选题】Passage Three Questions 31 to 35 are based on the following passage. What are the specific traits that will assist executives to climb the ladder of success? Opinions vary widely. Given approximately ...
A.
equal qualifications
B.
specific traits
C.
much education
D.
a degree of cruelty
【单选题】According to the passage, what is one difference between the hunting done by some humans and the hunting done by gray wolves?
A.
Some humans hunt more frequently than gray wolves.
B.
Gray wolves hunt in larger groups than some humans.
C.
Some humans can hunt larger animals than gray wolves can hunt.
D.
Some humans prey on animals of all ages, but gray wolves concentrate their efforts on young animals.
【简答题】理想消毒防腐药的条件有哪些?
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