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【单选题】
相关系数的取值范围是（ ）。A.
-1≤r≤1
B.
-l
C.
-l
D.
-l≤r<1< /div>
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举一反三
【单选题】You ought to put the milk in the refrigerator, now _____ sour.
A.
it is smelt
B.
it is smelling
C.
it smells
D.
it will smell
【单选题】You ought to have put the milk in the refrigerator ,now __ sour.
A.
I smell
B.
it is smelt
C.
it smells
D.
It is smelling
【单选题】You ought to have put the milk in the refrigerator, now___sour.
A.
it is smelt
B.
I smell
C.
it smells
D.
it is smelling
【单选题】You ought to have put the milk in the refrigerator. Now ____ sour.
A.
I smell
B.
it is smelt
C.
it smells
D.
it is smelling
【单选题】You ought to have put the milk in the refrigerator. Now it ___ sour.
A.
smell
B.
is smelt
C.
smells
D.
is smelling
【单选题】关于肺结核患者咯血时的护理措施的叙述,不正确的是
A.
绝对卧床休息
B.
消除紧张情绪
C.
鼓励患者轻咳将血排出，不可屏气
D.
协助患者健侧卧位，轻拍患者后背刺激咳嗽
E.
发现窒息先兆时应立即报告医生
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