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搜题
【单选题】
破坏蛋白质表面的水化膜或中和其分子表面电荷而使之沉淀的方法是
A.
盐析法
B.
透析法
C.
有机溶剂法
D.
过滤法
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知识点:
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【单选题】计算机犯罪侦查是指揭露和证实计算机犯罪案件,查获犯罪嫌疑人,依法收集相应的(),进行 专门的调查和实施强制性措施活动.
A.
痕迹物证
B.
电子证据
C.
物证痕迹
D.
数据痕迹
【单选题】to me. I'm very busy.
A.
Speak
B.
Won't speak
C.
Don't speak
D.
Will speak
【单选题】Working on a newspaper is a very busy job. Many newspapers【21】each day, and they have to【22】people with all the latest news. The editor is in【23】of the paper. Reporters【24】news stories and write them....
A.
printed
B.
print
C.
is printing
D.
are printed
【单选题】下列哪个函数可以用来执行 SQL 指令?
A.
mysqli_connect()
B.
mysqli_querry()
C.
mysqli_num_fields()
D.
mysqli_select_db()
【单选题】---Do you know the girl in red? ---She seems to ______ me at last month’s party. But I’m not sur
A.
15. ---Do you know the girl in red? ---She seems to ______ me at last month’s party. But I’m not sure. A.introduce to
B.
be introducing
C.
be introduced to
D.
have been introduced to
【多选题】劳务具有 的特点。
A.
无形性
B.
满足感
C.
易变性
D.
不可分离性
E.
不可储存性
【单选题】用定点补码加减法,怎么求[-Y] 补?
A.
将[Y]补 的各位(包括符号位)逐位取反,再在最低位加1
B.
将[Y]补 的各位(包括符号位)逐位取反,再在最高位加1
C.
将[Y]补 的各位(包括符号位)逐位取反,
D.
将[Y]补 的各位(不包括符号位)逐位取反,再在最高位加1
【简答题】设随机变量 在[0,5]上服从均匀分布,求 的数学期望 ( ),方差 ( )。 (精确到小数点后两位)
【单选题】反映均数抽样误差的是
A.
标准差
B.
标准误
C.
变异系数
D.
全距
【单选题】W: Wow! Your apartment is really large. How many roommates do you have? M: Yeah, this is a large apartment with 5 bedrooms. Each one has 3 roommates. How many people share the same apartment?
A.
Five.
B.
Eight.
C.
Ten.
D.
Fifteen.
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