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【简答题】
下列情况各引起什么误差?如果是系统误差,消除? (1) 以含量为 98% 的 CaCO 3 作为基准物质,标定 EDTA 标准溶液的浓度。
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皮皮学刷刷变学霸
举一反三
【单选题】The tetanus of skeletal muscle is due to
A.
summation of twitich during muscle contraction.
B.
summation of the successive subthreshold stimulation.
C.
summation of action potentials during muscle contraction
D.
summation of action potential during muscle relaxation.
E.
summation of twitch during muscle relaxation.
【单选题】The longest muscle in an animal's body is ( )
A.
iliocostal muscle
B.
the sandwich muscle
C.
the semi-spinous muscle of the head
D.
the dorsal longus muscle
【简答题】教材第200页第14题:
【多选题】According to the content of tendon fiber and the direction of muscle fiber arrangement, muscle can be divided into（ ）
A.
dynamic muscle
B.
striated muscle
C.
static muscle
D.
dynamic and static muscle
【简答题】教材第200页第14题:
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