【简答题】肉桂酸甲酯 常用于调制具有草莓、葡萄、樱桃、香子兰等香味的食用香精 (1)肉桂酸甲酯的分子式是______; (2)下列有关肉桂酸甲酯的叙述中,正确的是______(填字母); A.能与溴的四氯化碳溶液发生加成反应 B.无法使酸性高锰酸钾溶液褪色 C.在碱性条件下能发生水解反应 D.不可能发生加聚反应 (3)G为肉桂酸甲酯的一种同分异构体,其分子结构模型如图所示(图中球与球之间连线表示单键或双键)...
【简答题】In a language Y, all words of the form C 1 C 2 VC 3 C 4 conform to the following restrictions (a) C 1 must be an obstruent (b) C 2 must be a sonorant (c) If C 3 is a sonorant, C 4 must be an obstruent...
【单选题】下列哪种酶对多肽链中赖氨酸和精氨酸的羧基参与形成的肽键有专一性?
【单选题】下列哪种酶对有多肽链中赖氨酸和精氨酸的羧基参与形成的肽键有专一性
【单选题】The captain urged that the mission before dark. [ ]
【多选题】An administrator is configuring a Catalyst switch with VLAN information that must be automatically distributed to other Catalyst switches in the network. What conditions must be met in order for the V...
A.
The switch that will share its VLAN configuration must be in VTP server mode.
B.
The switches must be in the same VTP domain.
C.
The switch that will share the VLAN information must be configured as the root bridge.
D.
The switches must be connected over VLAN trunks.
E.
The switches must be configured to use the same STP version.
F.
The switches must have VTP pruning activated.
【单选题】下列复合函数分解为基本初等函数的步骤不正确的是
【简答题】肉桂酸甲酯( )常用于调制具有草莓、葡萄、樱桃、香子兰等香味的食用香精。 (1) 肉桂酸甲酯的分子式是_______; (2)有关肉桂酸甲酯的叙述中,正确的是_______(填标号) A.能与溴的四氯化碳溶液发生加成反应 B.无法使酸性高锰酸钾溶液褪色 C.在碱性条件下能发生水解反应 D.不可能发生加聚反应 (3)G为肉桂酸甲酯的一种同分异构体,其分子结构模型如下图所示(图中球与球之间连线表示单...
【单选题】下列哪种酶对有多肽链中赖氨酸和精氨酸的羧基参与形成的肽键有专一性()