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【单选题】
设 为可导函数,且 ,则 ( )A.
0
B.
-1
C.
1
D.
2
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【简答题】用下列词语的适当形式填空 get involved in opportunity broad creat interest 1. I tried to tell him about it, but he just wasn't ______.
【单选题】---- Did the door-keeper let you in ? --- No, I tried to tell him that I was your relative, he just wouldn’t listen to me.
A.
No matter
B.
Even if
C.
However
D.
Whether
【单选题】磁场中任一点的磁场方向 , 规定为小磁针在磁场中 ( ) A . 受磁场力的方向 B . 北极受磁场力的方向 C . 南极受磁场力的方向 D . 转动的方向
A.
B.
C.
D.
D
【单选题】-----Did the door-keeper letyou in? -----No, ____ I tried to tell him that I was your uncle, he just wouldn’t listen to me.
A.
no matter
B.
even if
C.
however
D.
whether
【单选题】中毒物质不明的患者,用电动吸引法洗胃,下述哪项不妥
A.
洗胃液用生理盐水
B.
电动吸引器压力为13.3KPa(100mmHg)
C.
插管动作轻快
D.
每次灌入量以200ml为限
E.
洗胃过程患者主诉腹痛或流出血性灌洗液，应停止
【简答题】.常温下，向20 mL 0.2 mol/L H 2 A溶液中滴加0.2 mol/L NaOH溶液。有关微粒的物质的量变化如图（其中I代表 H 2 A，Ⅱ代表HA - ，Ⅲ代表A 2- ），根据图示判断，下列说法正确的是 [ ] A.当V( NaOH)=20 mL时，溶液中离子浓度大小关系：c(Na + )>c(HA - )>c(H + )>c(A 2- )>c(OH - ) B．...
【简答题】I tried to tell him about it, but he just wasn't __________.
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