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【单选题】
在加密技术中,把明文变为密文的过程称为()。
A.
明文
B.
密文
C.
加密
D.
解密
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【单选题】直线上腕臂柱在垂直线路方向的外倾斜率为()
A.
1%~0.3%
B.
0%~0.5%
C.
0.3%~0.5%
D.
0.5%~1%
【简答题】双块式无砟轨道结构由钢轨,扣件系统,( ),道床板,底座(支承层)等结构组成。
【单选题】My brother often ____________ home at 5: 00. [     ]
A.
come
B.
comes
C.
to come
D.
comes to
【单选题】17)直线上腕臂柱在垂直线路方向的外倾斜率为( )。
A.
(A)1%~0.3%
B.
(B)0%~0.5%
C.
(C)0.3%~0.5%
D.
(D)0.5%~1%
【单选题】After a successful operation, my brother is beginning to ___ and will soon come back to school.
A.
pick up
B.
wake up
C.
grow up
D.
show up
【单选题】–How come ___________?—I had to look after my sick brother.
A.
didn’t you come to the party yesterday
B.
did you not come to the party yesterday
C.
you didn’t come to the party yesterday
D.
you came to the party yesterday
【单选题】----Who will come and_______ if you don’t? ----Either my father or my brother will come to the airport.
A.
put me off
B.
turn me off
C.
take me off
D.
see me off
【简答题】给下列句子排序。 (     ) Happy birthday, Jenny! (     ) My mother and father, sister and brother will come. (     ) Will you come to my birthday party, too? (     ) Hi, Li Ming! Today is my birthday! (     ) ...
【单选题】--- Will you stay for meal as more friends will come for a gathering? --- Sorry, _______. My brother is coming to see me.
A.
I mustn’t
B.
I can’t
C.
I needn’t
D.
I won’t
【单选题】安装在曲线外侧及直线上的支柱,在垂直线路方向要向受力的反向倾斜。腕臂柱的外倾斜率为()%。
A.
0-0.5
B.
0.5-1
C.
1-2
D.
2-3
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