【单选题】据悉,奥运会上使用的发令枪所用的“火药”成分是氯酸钾和红磷,经撞击发出响声同时产生白色烟雾.撞击时发生的化学方程式为:5KClO 3 +6P=3P 2 O 5 +5KCl,下列有关叙述正确的是( )
A.
上述反应中氧化剂和还原剂的物质的量之比为6:5
B.
上述反应中消耗62gP时,转移电子的物质的量为15mol
C.
因红磷和白磷互为同分异构体,所以上述火药中的红磷可以用白磷代替
D.
产生白色烟雾的原因是生成的P 2 O 5 白色固体小颗粒(烟)吸水性很强,吸收空气中的水分,生成磷酸小液滴(雾)
【简答题】上海人容易听懂苏州话,因为上海话和苏州话有许多共同之处。(in common)
【单选题】上海人容易听懂苏州话,因为上海话和苏州话有许多共同之处。
A.
People from Shanghai are easy to understand Suzhou dialect, for Shanghai dialect and Suzhou dialect have much in common.
B.
It’s easy for people from Shanghai to understand Suzhou dialect, for Shanghai dialect and Suzhou dialect have much in common.(Or: … for both dialects have much in common.)
【单选题】下面选项中,哪个可以正确创建一个名称为 itcast 的数据库?
B.
CREATE DATABASE itcast;
C.
Alter DATABASE itcast;
【简答题】为保证电气化区段的可靠供电,禁止由供电线、正馈线和区间接触网上引接非牵引负荷。对当地无电源,只能利用接触网供电者,经铁路局批准可允许由 _________ 接触网引接少量的非牵引负荷,其主管部门对设备要加强管理,认真维护保养,确保接触网的正常供电。
【简答题】翻译: 上海人容易听懂苏州话,因为上海话和苏州话有许多共同之处。 (in common)
【单选题】上海人容易听懂苏州话,因为上海话和苏州话有许多共同之处。以下翻译文本中,哪个是最贴切的?
A.
People from Shanghai are easy to understand Suzhou dialect, for Shanghai dialect and Suzhou dialect have much in common.
B.
People from Shanghai are easy to understanding Suzhou dialect, for Shanghai dialect and Suzhou dialect have much in common.
C.
It’s easy for Shanghai people to understand Suzhou dialect, for Shanghai and Suzhou dialects have much in common.
D.
It’s easy for Shanghai people to understanding Suzhou dialect, for Shanghai and Suzhou dialects had much in common.
【判断题】色彩与形状在人的心理感应上会有相似的地方。