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【多选题】
HLB值在8-16的可用作
A.
O/W型乳化剂
B.
W/O型乳化剂
C.
润湿剂
D.
去污剂
E.
消泡剂
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【简答题】Read the following paragraphs carefully and write a topic sentence for each paragraph. 1. Famous inventor Thomas Edison, for instance, did so poorly in his first years of school that his teacher warne...
【单选题】He did poorly in his examination,______ how hard he had studied for them.
A.
considering
B.
to consider
C.
thinking
D.
regarding
【单选题】He did poorly in his examinations, ______ how hard he had studied for them.
A.
considering
B.
to consider
C.
regarding
D.
to regard
【单选题】He did poorly in his examination, ______ how hard he had studied for them.
A.
considering
B.
to consider
C.
regarding
D.
to regard
【单选题】在关系模式中,实现“关系中不允许出现相同的元组”的约束是()约束。
A.
候选键
B.
主键
C.
D.
任一键
【简答题】2 请回忆所学请求信常用句型
【单选题】在关系模式中,实现“关系中不允许出现相同的元组”的约束是( )。
A.
候选键
B.
主键
C.
D.
任一键
【简答题】若x,ij和k都是int型变量,则计算表达式x=(i=4,j=16,k=32)后,X的值为( )。 A)4 B)16 C)32 D)52
【简答题】A.He and Elizabeth argued recently. B.He heard Elizabeth did poorly on the last test. C.He doesn't want to bother Elizabeth so late in the evening. D.He'd rather study in his own dormitory.
【单选题】若x,i,j和k都是int型变量,则执行下面表达式后X的值为()
A.
32
B.
4
C.
16
D.
52
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