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【单选题】
点浇口不适用于( )塑料。A.
热敏性塑料
B.
热塑性塑料
C.
热固性塑料
D.
纤维增强塑料
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
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【单选题】用标准差比较分析两个同类总体平均指标的代表性的前提条件是( )。
A.
两个总体的标准差应相等
B.
两个总体的平均数应相等
C.
两个总体的单位数应相等
D.
两个总体的离差之和应相等
【单选题】A strong man will __________ with the storm of fate.
A.
struggle
B.
decide
C.
comfort
D.
force
【单选题】A strong man will ()with the storm of fate.
A.
force
B.
forced
C.
is forced
D.
forceing
【单选题】为了用标准差比较分析两个同类总体平均指标的代表性，前提条件是( )。
A.
两个总体的标准差应相等
B.
两个总体的平均数应相等
C.
两个总体的离差之和应相等
D.
两个总体的单位数应相等
【简答题】A strong man will bear _____ without complaining.
【单选题】The earthquake caused to the district.
A.
damages
B.
damage
C.
a damage
D.
the damage
【简答题】用标准差比较分析两个同类总体平均指标的代表性，其基本的前提条件是（ ）。
【单选题】Which is the correct way to act in an earthquake?A.Run downstairs and cover your h
A.
58. Which is the correct way to act in an earthquake? A. Run downstairs and cover your head and neck with your arms.
B.
Drive your car quickly through the overpass and get out of it.
C.
When you stay under a strong piece of furniture, you should hold on to it and be prepared to move with it.
D.
Climb over the back of the seat and cover your head and neck with your arms.
【简答题】A strong man will bear ________ (hard) without complaining.
相关题目：
【单选题】为了用标准差比较分析两个同类总体平均指标的代表性，前提条件是( )。
A.
两个总体的标准差应相等
B.
两个总体的平均数应相等
C.
两个总体的离差之和应相等
D.
两个总体的单位数应相等