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【单选题】
已知直线l过点(-2,0)，当直线l与圆x 2 +y 2 =2x有两个交点时，其斜率k的取值范围是( )A.
(-2 ,2 )
B.
(- , )
C.
(- )
D.
(- )
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举一反三
【单选题】女,45岁,肢体软弱无力、夜尿多2年余,今晨起双下肢不能活动。查体:血压170/100mmHg,均匀性轻度肥胖,双下肢松弛性瘫痪,血钾2.4mmol/L。最可能的诊断为:
A.
原发性高血压
B.
嗜铬细胞瘤
C.
肾性高血压
D.
原发性醛固酮增多症
E.
库欣病
【单选题】In order to cope with most illnesses, the author thinks that people will have to do all of the following except ______.
A.
find more curative rays
B.
produce more curative drugs
C.
develop more powerful diagnostic instruments
D.
see through five inches of living flesh at least
【简答题】A．People will have to rely on Kudzu for a living. B．They will soon be overgrown with Kudzu. C．They will become too hard to plough. D．People will find it hard to protect the soil.
【单选题】The damaged building , so the people will have to look for other places to shelter themselves from the cold.
A.
is being repaired
B.
is repaired
C.
has been repaired
D.
was repaired
【简答题】The water was so clear that it ______ (reflect) the trees on the river bank.
【简答题】,终岁不闻丝竹声。
【单选题】无论哪一种数控机床都规定Z轴作为平行于主轴中心线的坐标轴，如果一台机床有多根主轴，应选择（）工件装卡面的主要轴为Z轴。
A.
平行于
B.
垂直于
C.
靠近于
D.
远离于
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