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【单选题】
在一个链队中,若f,r分别为队首、队尾指针,则插入s所指结点的操作为( )。A.
f->next=c;f=s
B.
r->next=s;r=s
C.
s->next=r;r=s
D.
s->next=f;f=s
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举一反三
【单选题】Susan’s parents hopes ________________.
A.
she can enter a good senior high school
B.
her to enter a good senior high school
C.
she entered a good senior high school.
D.
her to have entered a good senior high school
【单选题】程序段N10 R1=30 R2=32 R3=50 R4=20;N20 G00 X=R2*SIN(R1)+R4 Z=R2*COS(R1)+R3;中,只对X坐标值有影响的R参数是( )(SIEMENS系统)。
A.
R1
B.
R2
C.
R3
D.
R4
【简答题】氧气输气总管向网性透热氧气瓶充气,已知输气总管中氧气的状态: 为298K. 为0.3 MPa,氯气瓶的体积为0.8 ,周围环境温度为298K,并测得充气前后氧气瓶的最差为2kg,试计算充气前后氧气瓶中氯气的质量及绝对压力。
【单选题】--Susan's parents have bought -a large house with a swimming pool in Paris. --It be very expensive.
A.
can't
B.
can
C.
mustn't
D.
must
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