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【单选题】
关于机械能守恒定律的适用条件,下列说法中正确的是( )A.
物体所受的合外力为零时，机械能守恒
B.
物体沿斜面加速下滑过程中，机械能一定不守恒
C.
系统中只有重力和弹簧弹力做功时，系统的机械能守恒
D.
在空中飞行的炮弹爆炸前后机械能守恒
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【单选题】Personally I think he's ______ the most original of all the contemporary fashion designers.
A.
in all
B.
by far
C.
for all
D.
at best
【单选题】Personally I think it is the sales manager, rather than the sales girls, ____ to blame. [ ]
A.
is
B.
that is
C.
are
D.
who are
【简答题】月末汇总各部门领料情况。其中:为生产A产品领用材料共计15,000元,为生产B产品领用各种材料共计10,000元,车间一般耗用2,000元,管理部门领用1,000元,销售部门领用3000元。
【单选题】Personally I think the ______ Andrew drew from his simple experiment is not scientific.
A.
conclusion
B.
decision
C.
information
D.
invention
【单选题】听力原文：M: Personally I think the blue hat is more suitable for me. W: No, I prefer the blaek one. What does the woman mean7
A.
She likes the blue one.
B.
She likes the black one.
C.
She likes both.
【单选题】Personally I think it is the sales manager, the sales girls, that is to blame.
A.
other than
B.
rather than
C.
more than
D.
less than
相关题目：
【简答题】月末汇总各部门领料情况。其中:为生产A产品领用材料共计15,000元,为生产B产品领用各种材料共计10,000元,车间一般耗用2,000元,管理部门领用1,000元,销售部门领用3000元。