更多"[单选题]___ is mentioned above, the nu"的相关试题:
[判断题]CH3COOCH2CH(CH3)2+CH3OH→CH3COOCH3+(CH3)2CHCH2OH属于酯的硝解。
A.正确
B.错误
[判断题]CH,COOCH,CH(CH)+CHOH-CHCO0CH+(CH)CHCH,OH 属于酯的硝解。
A.正确
B.错误
[单选题]用系统命名法命名时,化合物CH3CH(CH3)
CH2COOH应称为( ) 。
A.3-甲基丁酸
B.2-甲基丁酸
C.异丙基乙酸
D.异丁基甲酸
[单选题]下列化合物合成时中间代谢物为HOOCCH2C（OH）CH3CH2COCoA的是
A.胆碱
B.谷氨酸
C.不饱和脂酸
D.丙二酰CoA
E.胆固醇
[单选题](829276)实验室制取乙酸乙酯CH3COOH+C2H5OH=CH3COOC2H5+H2O ，冰醋酸5ML（0.09MOL），95%乙醇6ml过
量），反应平衡常数计算K=3.77，乙酸乙酯实验产率为（ ） 。(1.0分)
A.50%
B.60%
C.70%
D.80%
[单选题]The （ ） modulation predominates above the glidepath and the （ ） modulation predominates below.
A.A、90-Hz， 150-Hz
B.B、150-Hz， 90-Hz
C.C、60-
Hz，90-Hz
D.D、90-
Hz，60-
Hz
[单选题]已知x=43,ch='A',y=0,则表达式(x>=y&&ch<'B'&&!y)的值是( ).
A.0
B.语法错
C.1
D."假"
[单选题]If the aircraft is above the glidepath， the（ ）depth of modulation predominates causing a downward deflection of the indicator
A.A、90-Hz
B.B、150-Hz
C.C、1020-
Hz
D.D、90-Hz
and 150- Hz
[单选题]CH2 =CHCOCl称作( )。
A.丙烯酸氯
B.丙烯酰氯
C.丙烯酸氧氯
D.丙烯氯氧
[单选题]CH3COOH又名( )。
A.丙酸
B.乙酸
C.甲酸
[单选题]Neutrophilia indicates that the number of neutrophil in peripheral blood is over, (A1型题)“专业知识”
A.3×109/L
B.6×109/L
C.7×109/L
D.4×109/L
E.5×109/L
[单选题] The number of articles published on smoking ________ surprising.
A.is
B.are
C.were
D.have been
[单选题]CH2=CHCOOOCH3称为( ) 。
A.丙烯甲酸酐
B.丙酸甲酯
C.丙酰甲酸
D.乙酸乙酯
[单选题]Helen had to shout ________ above the sound of the music. ( )
A. making herself hear
B. to make herself hear
C. making herself heard
D. to make herself heard
[单选题]CH003 蓄电池的连接方法有（ ）
A.串联、并联两种
B.串联、并联、混连3种
C.串联、混连两种
D.并联、混连两种
[单选题]The visit to the school his memory of his childhood.（2 分）
A.brought about
B.brought in
C.brought forth
D.brought back
[单选题]CH200底板根据槽数分为（）。
A.2种
B.3种
C.4种
D.5种
[判断题]Reply Coding defined as the number of pulse pairs transmitted per second.（
）
A.正确
B.错误
