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【简答题】
下列方程组是二元二次方程组的是(  ) A. x+3y=5 4x-6y=9 B. x 2 -3 y 2 =2x+5 x+ 1 y =3 C. y=3-5 x 2 x 2 -x-6=0 D. x 2 +1 =2y 3y=-x
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参考答案:
举一反三
【单选题】I wonder how long ago ______.
A.
did it begin
B.
it began
C.
it did begin
【判断题】Coherence refers to a logical connection and sequence of ideas and points.()
A.
正确
B.
错误
【简答题】coherence /cohesion(浙江大学2004研)
【多选题】What do you mean by coherence?
A.
It refers to the flow of one’s writing.
B.
The idea should be logically organized and appropriately sequenced in the paragraphs.
C.
Using adverbs of time will help to achieve coherence.
D.
Adverbs of time include now, then, soon, recently, later, before, early, today, etc.
【单选题】When is the Paris coherence?
A.
B.
C.
【单选题】免疫防御是指机体能( )
A.
对抗病原体的侵害并中和其毒性产物的作用
B.
监视并清除体内突变细胞的作用
C.
清除衰老和损伤的细胞,维持体内环境平衡的作用
D.
对抗原性异物表现出无反应性的状态
E.
对自身抗原表现出无反应性的状态
【多选题】下列的那些命令可以用来检测用户lisa的信息?()
A.
finger lisa
B.
grep lisa/etc/passwd
C.
find lisa/etc/passwd
D.
who lisa
【单选题】—I wonder_______ you'll water this kind of tree.     —Once a week. [     ]
A.
how often
B.
how long
C.
how soon
D.
how much
【简答题】__________ [A]unmarry [B]marriage [C]coherence [D]department
【多选题】信息存储包括那些?
A.
感觉记忆
B.
短时记忆
C.
长时记忆
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