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【单选题】
化学与科学、技术、社会、环境密切相关。下列有关说法中正确的是A.
明矾[KAl(SO 4 ) 2 .12H 2 O]在水中能形成Al(OH) 3 胶体，可用作净水剂
B.
变质的植物油有难闻的特殊气味，是由于植物油发生了酯化反应
C.
浸泡过高锰酸钾溶液的硅藻土放于新鲜的水果箱内是为了催熟水果
D.
海水淡化可以解决淡水危机，向海水中加入明矾可以使海水淡化
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【单选题】What kind of services does Athens Daily Menu provide?
A.
catering services
B.
car services
【单选题】下面 4 个选项中,均不是合法浮点数的选项是
A.
160.,0.12,e3
B.
123,2e4.2,e5
C.
-.18,123e4,0.0
D.
-e3,.234,1e3
【单选题】What does the writer of this passage disapprove of regarding services now?
A.
Their fast growth.
B.
Their decline.
C.
Their prices.
D.
Their quality.
【单选题】亲水胶体溶液中加入一定量的乙醇可出现沉淀,这是因为
A.
溶媒浓度改变析出沉淀
B.
盐桥作用析出沉淀
C.
质量电荷改变析出沉淀
D.
胶体水化膜被破坏析出沉淀
E.
电荷中和凝结成沉淀
【单选题】下面4个选项中,均是不合法浮点数的选项是( )。
A.
160 0.12 E3
B.
123 2e4.2 .e5
C.
-.18 123e4 0.0
D.
–e3 234 .1e3
【单选题】What does the course 'Managing Public Services' involve?
A.
Organizational Behavior.
B.
Different modules of interests.
C.
Theories of public services.
D.
Management of business.
【单选题】According to the advertisement, what does Peace Piano Services encourage its customers to do?
A.
Apply for a store credit card
B.
Buy a piano through its web site
C.
Try out pianos in its stores
D.
Compare prices with those in competing stores
【单选题】What does the professor imply about funerals and memorial services?
A.
They are becoming a major expense for bereaved families.
B.
They include three days of fasting and silent prayer.
C.
They are part of a growing industry associated with death.
D.
They help make the person's life and death meaningful.
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