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【单选题】
测定总酸的方案如下: 取20mL稀释的酱油样品,加入60mL蒸馏水至烧杯中,用0.05mol/L的氢氧化钠标准溶液滴定至pH为8.2。 采用下面那种模式测量?A.
DET
B.
MET
C.
SET
D.
CAL
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反馈参考答案：
举一反三
【单选题】It seems that_____ is the musical instrument used throughout the history of blues.
A.
saxophones
B.
brasses
C.
guitars
D.
drums
【单选题】By an ohmmeter ______ the instrument used to measure resistance.
A.
mean
B.
means
C.
is meant
D.
are meant
【单选题】______ is the instrument used for indicating direction.
A.
Compass
B.
Paper
C.
gun powder
D.
Printing
【判断题】The tone in Kennedy’s Inaugural Address is appropriate because he uses different tones to address different groups of nations.
A.
正确
B.
错误
【单选题】The instrument used by doctors to listen to patients' heart or beating is called __________.
A.
laryngoscope
B.
stethoscope
C.
otoscope
D.
arthroscope
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