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【多选题】
以下关于登记误差产生的原因中,表述正确的是( )
A.
由于计算手段的局限性所带来的,难以绝对符合实际而出现的误差
B.
由于登录、计算、抄报、汇总错误及被调查者所报不实,或调查者有意虚报、瞒报等所带来的误差
C.
采用了有缺陷的抽样框造成的
D.
调查问卷设计不科学造成的
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【判断题】碳素结构钢的牌号采用表示屈服点的字母“Q”、屈服点的数值和质量等级、脱氧方式等符号来表示
A.
正确
B.
错误
【单选题】Identify the topic sentence of this paragraph Some books read in childhood are truly unforgettable. Some of the characters, the paces, the adventures experienced with so much excitement when one is qu...
A.
Some of the characters, the paces, the adventures experienced with so much excitement when one is quite young, stay in one’s mind as long as memory lasts.
B.
Some books read in childhood are truly unforgettable.
C.
Such a character is Long John Silver in Robert Louis Stevenson’s Treasure Island .
D.
Who would give up these perfect childhood memories?
【简答题】It can be erous to travel by sea. Ships sometimes sink(下沉) far away from land. When this happens, the sailors(海员) have to get into small boats. If another ship does not come and help them and they...
【判断题】活性中心的氨基酸残基占酶分子氨基酸残基数目的10-20%。
A.
正确
B.
错误
【单选题】碳素结构钢的牌号采用屈服点的字母“Q”、()和质量等级、脱氧方式等符号来表示。
A.
抗拉强度的数值
B.
冲击韧度的数值
C.
屈服点的数值
D.
伸长率的数值
【判断题】活性中心的氨基酸残基占酶分子氨基酸残基数目的10-20%。( )
A.
正确
B.
错误
【单选题】脱 氧方式等符号来表示。
A.
抗拉强度的数值
B.
冲击初性的数值
C.
屈服点的数值
D.
伸长率的数值
【判断题】碳素结构钢的牌号采用屈服点的字母“Q”,抗拉强度的数值和质量等级、脱氧方式等符号来表示。()
A.
正确
B.
错误
【单选题】起病4周后,病人反复低热,左肺底部有湿性哆音,心前区闻及心包摩擦音,此时应考虑并发
A.
肺部感染
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急性心包炎
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感染性心内膜炎
D.
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E.
肺栓塞
【单选题】The passengers_______when the ship was heavily rolling. 查看材料
A.
slept well
B.
could drink a lot of water
C.
had to stay below deck
D.
had a big room of more than 5 foot high
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