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【单选题】
可以将甲酸和乙酸鉴别开的试剂是( )A.
石蕊试纸
B.
多伦试剂
C.
碳酸钠溶液
D.
氢氧化钠溶液
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】To his joy, the suggestion he put forward at the meeting was _______ immediately.
A.
adopted
B.
abandoned
C.
argued
D.
avoided
【单选题】He was wild with joy when he ______ a solution to the difficult problem.
A.
made up with
B.
put up with
C.
came up with
D.
kept up with
【单选题】True happiness does not the possession of money, but the joy of achievement.
A.
contribute to
B.
consist in
C.
result in
D.
add to
【简答题】中央接线盒的正面安装 __________________ 和 ________________ ,背面是 __________ 。中央接线盒上标明了熔丝的位置、容量和继电器位置编号及接线端子号等。
【单选题】It was with great joy _______ he worked out the problem that he had long been puzzled about.
A.
which
B.
that
C.
because
D.
since
【简答题】刀具的 工艺磨钝标准VB值一般 合理磨钝标准VB值。
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