【简答题】糖类按单糖的聚合度可分为几类?每一类包括哪些主要糖?是否所有糖类都有甜味?哪种糖是天然糖中最甜的一种?简要说明糖在人体内的作用和功能。
【判断题】无论是商业承兑汇票还是银行承兑汇票,一经承兑,付款人都负有到期无条件支付票款的责任。
【判断题】38 CrSi、35 CrMo属于中淬透性调质钢,常用于制造较小的齿轮、轴、螺栓等零件。
【简答题】葡萄糖(C 6 H 12 O 6 )是人体中提供能量的最基本糖类物质,它在酶的作用下,反应放出的能量用于满足人体的机体活动和维持体温恒定.请根据其组成填空: (1)葡萄糖由______种元素组成,属于______(填“有机物”或“无机物”). (2)1个葡萄糖分子中含有______个原子.
【单选题】葡萄糖是人生理活动中的重要物质,它在人体组织工作中的作用是( )
【单选题】What is Alexander ’ s view on tariffs collected by the US government? Alexander said there’s evidence that tariffs collected by the U.S. government are being paid by American firms and consumers, rath...
A.
It will have no effect on the U.S. economy.
B.
It will have negative effect on the U.S. economy.
C.
It will have positive effect on the U.S. economy.
【单选题】The passage tells us that there is ______.
A.
a central library in each area
B.
a library in the center of each area
C.
one central library for all areas
D.
more than one central library in each area
【简答题】第一艘实用轮船是美国发明家()发明的,其建造的汽船首航成功,标志着()取代帆船的新时代的到来。
【单选题】The easy way to use the library service is to______.
A.
inform. the library of your name and address
B.
tell the library the sorts of books you like
C.
buy the catalogues of the library
D.
ask the library to buy the books