【简答题】(10分)下图为实验室某浓盐酸试剂瓶标签上的有关数据,试根据标签上的有关数据回答下列问题: ⑴该浓盐酸中HCl的物质的量浓度为 mol·L -1 。 ⑵取用任意体积的该盐酸溶液时,下列物理量中不随所取 体积的多少而变化的是。 A.溶液中HCl的物质的量 B.溶液的浓度 C.溶液中Cl - 的数目 D.溶液的密度 ⑶某学生欲用上述浓盐酸和蒸馏水配制500 ml 物质的量浓度为0.400...
【判断题】LKJ2000型列车运行监控记录装置能防止列车越过关闭的进站信号机。
【单选题】An expensive project like this is ______ with the government's aim of reducing public spending.
【单选题】They prefer to _______ the rest of the morning walking in the garden.
【单选题】As an investment banker specializing in mergers and acquisitions, Francois yon Hurter spent a lot of time in airport lounges, where he'd often set aside the latest deal calculations in favor Of a good...
A.
English mystery novels written by London-based writers.
B.
Mystery novels which offer social criticism and a slice of culture, written originally not in English.
C.
Travel fiction which take readers to locales like Mexico City, Munich and Havana.
D.
Hard-boiled mystery novels translated into English for the first time.
【简答题】LKJ2000型列车运行监控记录装置,当出现()时 在信号机位置,按压[向后]键或[自动校正]键,装置将自动拉回提前越过的距离。