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【单选题】
已知平面α的法向量(1,-2,2),平面β的法向量(-2,4,k),若α ∥ β,则k的值为(  )
A.
5
B.
4
C.
-4
D.
-5
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举一反三
【单选题】w e can't live without electricity, we should be careful not to get on an electric shock。
A.
Although,but。
B.
Because so。
C.
Though,however。
D.
Though; /
【多选题】信息技术与课程整合的国内外实践情况有哪些?()
A.
计算机辅助教学
B.
教学改革试验研究
C.
新型教学结构
D.
运用几何画板革新教学的实验研究以及网络化教育
【简答题】(),附子粳米汤主之。
【简答题】阅读理解 Thomas Alva Edison lit up the world with his invention of the electric light. Without him, the world might stiIJ be a dark place. However,the electric light was not liis only invention. He also i...
【单选题】Thomas Alva Edison lit up the world with his invention of the electric light. Without him, the world might still be a dark place. However, the electric light was not his only invention. He also invent...
A.
24
B.
8
C.
12
D.
16
【单选题】We cannot imagine what our world ___like without electric power.
A.
is
B.
will be
C.
would be
D.
has been
【单选题】“腹中寒气,,胸胁逆满,呕吐,附子粳米汤主之”。( )
A.
胁下偏痛
B.
心胸中大寒痛
C.
绕脐痛
D.
上下痛而不可触近
E.
雷鸣切痛
【简答题】腹中寒气,(),胸胁逆满,呕吐,附子粳米汤主之。
【单选题】No one _____ the suspect without the permission of the police.
A.
is going to contact
B.
is to contact
C.
contacts
D.
contacted
【判断题】目前固体废物热转化的处理技术主要有两种形式:一是焚烧处理,直接将固体废物作为燃料,直接回收热量,综合利用;二是热解处理,将固体废物转化为燃料和化工原料进行间接利用。 ( )
A.
正确
B.
错误
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