(CH3)2CHCH2CH2OH+HBr→
(CH3)2CHCH2CH2OH+HBr→
(CH3)2CHCH2CH2OH+HBr→
A、ch >= 'A' && ch <= 'z' || ch>= 'a' && ch <=> B、ch >= A && ch <= z || ch>= a && ch <=> C、'A' <= ch || 'a'> D、A <= ch || a>
A、('a'<=ch<='z') ||> B、('a'<=ch<='z') &&> C、(ch>='a' && ch<='z') && (ch>='A' && ch<='z')<br> D、(ch>='a' && ch<='z' ) || (ch>='A' && ch<='z'>
A、ch >= 'A' && ch <='z'> B、ch <= 'z' && ch>= 'A'
C、'A' <= ch> D、ch >= 'A' || ch <= 'z'> E、ch >='A' AND ch <='z'> F、ch BETWEEN 'A' AND 'Z"
A.≥1.0%CH ,≥1.5%CH ,<1.0%CH
B.≥1.5%CH ,≥1.5%CH ,<1.0%CH
C.≥0.5%CH ,≥1.0%CH ,<0.5%CH
D.≥1.5%CH ,≥2.0%CH ,<1.5%CH
A.≥1.0%CH ,≥1.5%CH ,<1.0%CH
B.≥1.5%CH ,≥1.5%CH ,<1.5%CH
C.≥1.5%CH ,≥1.5%CH ,<1.0%CH
D.≥1.5%CH ,≥2.0%CH ,<1.5%CH
A.≥1.0%CH ,≥1.5%CH ,<1.0%CH
B.≥1.0%CH ,≥1.0%CH ,<1.0%CH
C.≥1.0%CH ,≥1.5%CH ,<1.5%CH
D.≥1.5%CH ,≥2.0%CH ,<1.5%CH
A.≥1.0%CH ,≥1.5%CH ,<1.0%CH
B.≥1.5%CH ,≥1.5%CH ,<1.5%CH
C.≥0.5%CH ,≥1.0%CH ,<0.5%CH
D.≥1.5%CH ,≥2.0%CH ,<1.5%CH
A.≥1.0%CH ,≥1.5%CH ,<1.0%CH
B.≥1.5%CH ,≥1.5%CH ,<1.5%CH
C.≥0.5%CH ,≥1.0%CH ,<0.5%CH
D.≥1.5%CH ,≥2.0%CH ,<1.5%CH
A.if('z'>=ch>='a') ch=ch-32;
B.if(ch>='a'&&ch<='z') ch="ch-32;<br">
C.ch=('z'>=ch>='a')?ch-32:ch;
D.ch=(ch>='a'&&ch<='z')?ch:ch-32;<br>
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