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【单选题】
已知函数 的图象为M,为了得到函数 的图象,只要把M上所有的点:
A.
横坐标伸长到原来的 倍,纵坐标不变
B.
横坐标缩短到原来的 倍,纵坐标不变
C.
纵坐标伸长到原来的 倍,横坐标不变
D.
纵坐标缩短到原来的 倍,横坐标不变
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参考答案:
举一反三
【单选题】Both longitude and latitude ______ in degrees, minutes and seconds.
A.
measurin
B.
measured
C.
are measured
D.
being measured
【简答题】完形填空。 The best way of learning a language is always using it. The best way of learning 1 English is talking in English as much as possible. Sometimes  you'll get your 2 mixed up and people will not 3 ...
【简答题】往含有Cu2+、Fe3+和Mg2+(浓度均为0.1 mol/L)的溶液中加入过量铁粉,充分反应后,溶液中浓度最大的阳离子是 .
【单选题】下列溶液中微粒的物质的量浓度关系正确的是(  )
A.
在FeCl 3 溶液中加入Mg(OH) 2 固体,溶液中c(Fe 3+ )下降
B.
CH 3 COOH溶液加水稀释后,恢复至原温度,溶液中c(OH - )和Kw都增大
C.
0.1 mol/L Na 2 CO 3 溶液:c(OH - )=c(HCO 3 - )+c(H 2 CO 3 )+c(H + )
D.
常温下,向0.01 mol/L NH 4 HSO 4 溶液中滴加NaOH溶液至中性:c (Na + )>c(NH 4 + )>c(SO 4 2- )>c(OH - )=c(H + )
【单选题】Both longitude and latitude ______ in degrees, minutes and seconds.
A.
measuring
B.
measured
C.
are measured
D.
being measured
【多选题】下列哪些疾病可以出现针尖样瞳孔
A.
脑桥出血
B.
阿片类药物过量
C.
有机磷农药中毒
D.
神经梅毒
E.
阿托品药物过量
【简答题】请用适当的词完成下面的短文,并把所缺单词填写在指定的位置上,每个空只能填写一个形式正确,意义相符的单词。 Almost everyone in the world has friends.How can we make our friendship last forever? In my opinion, it's nice to have1.____because we can talk, la...
【判断题】Formal and informal are two ways if classifying groups.
A.
正确
B.
错误
【简答题】用方框中所给单词或短语的适当形式填空 happy, proud, laugh at, stay in touch, try one's best, wake up 1.They all ____________ to study hard in order to go to college one day. 2.My neighbour is moving away, but I hope tha...
【简答题】单词拼写。 l.  In China, people _____ (握手) when they meet. 2. It's not polite to _____ (顺便拜访) a friend's home. 3. Don't talk to him like that. He's a child ____ (毕竟). 4. I'm gradually _____ (习惯于) the table...
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