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【单选题】
患者,男, 50 岁。近一段时间因工作压力较大睡眠时间明显缩短,诊断为失眠症 , 治疗患者失眠用A.
苯巴比妥
B.
氯醛
C.
地西泮
D.
硫喷妥钠
E.
硫酸镁
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【单选题】某酸在 18℃时的平衡常数为 1.14×10 -8 ，在 25℃时的平衡常数为 1.07×10 -8 ，则说明该酸（ ）。
A.
在 18℃时溶解度比 25℃时小
B.
酸的电离是一个吸热过程
C.
温度高时电离度变大
D.
温度高时溶液中的氢离子浓度变小
【简答题】A．It's up to his parents. B．It depends on his mood. C．The more suitable is his preference. D．The more important is his preference.
【单选题】What should the students write on the paper?
A.
Their names, phone numbers and job preference.
B.
The names and addresses of their guests.
C.
The names of the committee they worked on last year.
D.
Their dormitory name, address and phone number.
【单选题】Due to a constantly(71)environment, a poor understanding of the user's needs and preferences, as well as a(72)of willingness to modify(73)organizational structures and decision models, the full econom...
A.
modify
B.
changing
C.
modifying
D.
changed
【单选题】某酸在18°C时的平衡常数为1.84×10-5,在25°C时的平衡常数为1.87×10则说明该酸()
A.
在18℃时溶解度比25℃时小
B.
酸的电离是一个吸热过程
C.
.温度高时电离度变小
D.
温度低时溶液中的氢离子浓度变小
【单选题】某酸在18℃时的平衡常数为1.14×10 －8 ，在25℃时的平衡常数为1.07×10 －8 ，则说明该酸（）。
A.
在18℃时溶解度比25℃时小
B.
的电离是一个吸热过程
C.
温度高时电离度变大
D.
温度高时溶液中的氢离子浓度变小
【单选题】The underlined word in Paragraph 3 refers to______.
A.
chosen from
B.
given up
C.
made preference between
D.
achieved accordance between
【单选题】Due to a constantly(66)environment, a poor understanding of the user's needs and preferences, as well as a(67)of willingness to modify(68)organizational structures and decision models, the full econom...
A.
modify
B.
changing
C.
modifying
D.
changed
【单选题】In our school ________ students can search the Internet for useful information now.
A.
three hundreds
B.
three hundred of
C.
hundred of
D.
hundreds of
【单选题】某酸在18°C时的平衡常数为1.14×108,在25°C时的平衡常数为1.07×10-8则说明该酸()
A.
在18℃时溶解度比25℃时小
B.
酸的电离是一个吸热过程
C.
.温度高时电离度变小
D.
温度低时溶液中的氢离子浓度变小
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