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【简答题】
若直线 l 1 : ( a +1) x + a 2 y -3=0 与直线 l 2 : 2 x + ay -2 a -1=0 平行 , 则实数 a 的值为
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举一反三
【单选题】In order to get a full ______,customers must send back goods in the original packaging.
A.
discount
B.
refund
C.
return
【单选题】In order to get back into the real world, the author makes some changes in her life EXCEPT _________.
A.
Arranging to meet with the few remaining friends in New York City.
B.
Getting to the gym to set apart the weekend from the rest of her week.
C.
Getting overexcited when suddenly confronted with real live humans.
D.
Arranging interviews and appointments to get connected with others.
【单选题】In order to get a full __________, customers must send back goods in the original packaging.
A.
duscount
B.
refund
C.
return
【单选题】In order to get a full _____, customers must send back goods in the original packing.
A.
discount
B.
refund
C.
return
【简答题】In order to get a full r____, customers must send back goods in the original packaging.
【判断题】In order to get an object moving, you must push harder on it than it pushes back on you.
A.
正确
B.
错误
【单选题】对于直接承受动力荷载且需计算疲劳的对接焊缝拼接处，当焊件的宽度不同或厚度相差4mm以上时，应在宽度方向或厚度方向做成坡度小于______的斜坡。
A.
1:1
B.
1:2.5
C.
1:4
D.
1:5
【简答题】对于顺序表的插入算法insert_sqlist来说,若以结点移动为标准操作,则插入算法的在最坏情况下的移动次数为________,时间复杂度是________。在平均情况下的移动次数为________,时间复杂度是________。
【单选题】以下关于顺序表的叙述中正确的是 。
A.
顺序表的优点是存储密度大且插入、删除运算效率高
B.
顺序表属于静态结构
C.
顺序表中所有元素可以连续也可以不连续存放
D.
在有 n 个元素的顺序表中查找逻辑序号为 i 的元素的算法时间复杂度为 O( n ) (5.0分)
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