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【简答题】
如图,在正方体ABCD-A 1 B 1 C 1 D 1 中,EF⊥A 1 D,EF⊥AC,求证:EF∥BD 1 。
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参考答案:
举一反三
【单选题】气蚀是下列哪种 输送设备特有的现象
A.
压缩机
B.
真空泵
C.
离心泵
D.
往复泵
查看完整题目与答案
【单选题】---What about going to the movies this weekend? ----I went to the movies last weekend, so I want to do ___ this weekend.
A.
different anything
B.
different something
C.
anything different
D.
something different
查看完整题目与答案
【单选题】气蚀是下列( )输送设备特有的现象。
A.
压缩机
B.
真空泵
C.
离心泵法启动
D.
往复泵
E.
齿轮泵
查看完整题目与答案
【单选题】A murder would most likely occur ______.
A.
on a weekend night in summer
B.
on a weekend afternoon in summer
C.
on a weekend night in winter
D.
on a weekend afternoon in spring
查看完整题目与答案
【单选题】气蚀是下列( )输送设备特有的现象。
A.
压缩机
B.
真空泵
C.
离心泵
D.
往复泵
E.
齿轮泵
查看完整题目与答案
【单选题】A murder would most likely occur _____.
A.
on a weekend night in summer
B.
on a weekend afternoon in summer
C.
on a weekend night in winter
D.
on a weekday afternoon in spring
查看完整题目与答案
【单选题】为管理者的工作提供了结构保证,它是进行人员管理、指挥、协调和控制的前提( )。
A.
控制
B.
领导
C.
计划
D.
组织
查看完整题目与答案
【单选题】'What did you do _____?' 'I visited my uncle.' [ ]
A.
over the weekend
B.
for the weekend
C.
on weekend
D.
at the weekend
查看完整题目与答案
【单选题】---__________a new film in Star Cinema this weekend? ---Yes,There_____often new films at the weekend.
A.
Is there going to have;will be
B.
Will there have;are
C.
Will there be; will be
D.
Is there going to be;are
查看完整题目与答案
【单选题】--- How was your weekend ? --- ___________________
A.
I’d like to visit my uncle for this weekend.
B.
It was good.
C.
Did you have a nice weekend ?
D.
I used to spend my weekend in the country
查看完整题目与答案
相关题目:
【单选题】气蚀是下列哪种 输送设备特有的现象
A.
压缩机
B.
真空泵
C.
离心泵
D.
往复泵
查看完整题目与答案
【单选题】---What about going to the movies this weekend? ----I went to the movies last weekend, so I want to do ___ this weekend.
A.
different anything
B.
different something
C.
anything different
D.
something different
查看完整题目与答案
【单选题】气蚀是下列( )输送设备特有的现象。
A.
压缩机
B.
真空泵
C.
离心泵法启动
D.
往复泵
E.
齿轮泵
查看完整题目与答案
【单选题】A murder would most likely occur ______.
A.
on a weekend night in summer
B.
on a weekend afternoon in summer
C.
on a weekend night in winter
D.
on a weekend afternoon in spring
查看完整题目与答案
【单选题】气蚀是下列( )输送设备特有的现象。
A.
压缩机
B.
真空泵
C.
离心泵
D.
往复泵
E.
齿轮泵
查看完整题目与答案
【单选题】A murder would most likely occur _____.
A.
on a weekend night in summer
B.
on a weekend afternoon in summer
C.
on a weekend night in winter
D.
on a weekday afternoon in spring
查看完整题目与答案
【单选题】为管理者的工作提供了结构保证,它是进行人员管理、指挥、协调和控制的前提( )。
A.
控制
B.
领导
C.
计划
D.
组织
查看完整题目与答案
【单选题】'What did you do _____?' 'I visited my uncle.' [ ]
A.
over the weekend
B.
for the weekend
C.
on weekend
D.
at the weekend
查看完整题目与答案
【单选题】---__________a new film in Star Cinema this weekend? ---Yes,There_____often new films at the weekend.
A.
Is there going to have;will be
B.
Will there have;are
C.
Will there be; will be
D.
Is there going to be;are
查看完整题目与答案
【单选题】--- How was your weekend ? --- ___________________
A.
I’d like to visit my uncle for this weekend.
B.
It was good.
C.
Did you have a nice weekend ?
D.
I used to spend my weekend in the country
查看完整题目与答案
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