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【简答题】
You are supposed to write for the Postgraduates Association a notice to recruit volunteers for an international conference on globalization. The notice should include the basic qualification of applicant and the other information you think relative. You should write about 100 words on ANSWER SHEET 2. Do not sign your own name at the end of the letter. Use 'Postgraduates Association' instead. Do not write the address. (10 points)
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【简答题】化合物F是合成某种抗癌药物的中间体,其合成路线如下: (1)化合物F中的含氧官能团有羰基、________和________(填官能团名称)。 (2)由化合物D生成化合物E的反应类型是_____________________________。 (3)由化合物A生成化合物B的化学方程式是________________________________________________________...
【单选题】The slow speed main propulsion diesel operates on two-stroke cycle. At this low speed the engine requires no reduction gearbox between it and _____.
A.
thrust blocks
B.
propeller
C.
flying wheel
D.
rudder
【单选题】A slow-speed two-stroke diesel is usually arranged to operate continuously on heavy fuel oil and has available a supply for maneuvering conditions.
A.
lubricating oil
B.
diesel oil
C.
residual oil
D.
hydraulic oil
【单选题】A slow-speed two-stroke diesel is usually arranged to operate continuously on heavy fuel oil and has available a ___ supply for manoeuvring conditions.
A.
lubricating oil
B.
diesel oil
C.
residual oil
D.
hydraulic oil
【单选题】有机物W( )常用于合成维生素类药物。下列与W相关说法正确的是
A.
分子式为C 6 H 9 O 3
B.
分子中含有2种官能团
C.
分子中含有6种不同化学环境的氢原子
D.
水溶液中lmolW可与3molNaOH完全反应
【简答题】某有机物A的分子式为C 16 H 16 O 2 ,具有特殊的香味。已知 ①D、E互为具有相同官能团的同分异构体。E分子苯环上的氢若被Cl取代,其一氯代物只有两种。 ②F可以使溴的四氯化碳溶液褪色。 (1)B可以发生的反应有____________(选填序号)。 ①取代反应 ②消去反应 ③加聚反应 ④氧化反应 (2)D、F分子所含的官能团的名称依次是____________、____________...
【简答题】A slow-speed two-stroke diesel is usually arranged to operate continuously on heavy fuel and have available a diesel oil supply for manoeuvring conditions. The oil is stored in tanks in the double bot...
【简答题】一种含碳、氢、氧三种元素的有机化合物。已知:A中碳的质量分数为44.1%,氢的质量分数为8.82%;A只含有一种官能团,且每个碳原子上最多只连一个官能团:A能与乙酸发生酯化反应,但不能在两个相邻碳原子上发生消去反应。请填空: (1)A的分子式是 ,其结构简式是 。 (2)写出A与乙酸反应的化学方程式: 。 (3)写出所有满足下列3个条件的A的同分异构体的结构简式。①属直链化合物;②与A具有相同的官...
【单选题】The slow speed main propulsion diesel operates on two-stroke cycle. At this low speed the engine requires no reduction gearbox-between it and____
A.
thrust block
B.
propeller
C.
flying wheel
D.
rudder
【简答题】已知有机物A~F有如图转化关系 已知: ①A的分子式为C 10 H 20 O 2 ; ②B分子中有2个甲基; ③D、E互为具有相同官能团的同分异构体,D能与碳酸氢钠反应放出CO 2 ,E分子烃基上的氢原子若被Cl取代,其一氯代物有3种; ④F可以使溴的四氯化碳溶液褪色,G为高分子化合物。 请填写以下空白: (1)B可以发生的反应有__________(填序号)。 ①取代反应②消去反应③加聚反应④氧...
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