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【简答题】
When George was thirty-five, he bought a small plane and learned to fly it.  He soon became very good and made his plane do all kinds of tricks (特技). George had a friend, whose name was Mark. One day George offered to take Mark up in his plane. Mark thought, “ I’ve traveled in a big plane several times, but I’ve never been in a small one, so I’ll go. ” They went up, and George flew around for half an hour and did all kinds of tricks in the air. When they came down again,  Mark was glad to be back safely, and he said to his friend in a shaking voice, “Well , George,  thank you very much for those two trips in your plane.” George was very surprised and said, “ Two trips? ” “ Yes, my first and my last. ” answered Mark. 小题1:Which of the following statements is false? A.George learned to fly a plane very quickly . B.It took George a short time to learn to fly a plane. C.George had some difficulty learning to fly a plane. D.Mark decided to fly in George’s small plane. 小题2:When George did some tricks with his small plane, Mark was _____. A.unhappy B.excited C.frightened D.surprised 小题3:Mark went up in George’s plane _____. A.twice B.only once C.several times D.once or twice
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【多选题】依据GB2760-2011,食品添加剂使用时应符合以下哪些基本要求()
A.
不应对人体产生任何健康危害
B.
不应掩盖食品腐败变质
C.
不应掩盖食品本身或加工过程中的质量缺陷或以掺杂、掺假、伪造为目的而使用食品添加剂
D.
不应降低食品本身的营养价值
E.
在达到预期目的前提下尽可能降低在食品中的使用量
【简答题】设A为m×n矩阵,证明:方程Ax=Em有解的充要条件为R(A)=m.
【单选题】如果要求一个线性表既能较快地查找,又能适应动态变化的要求,则可采用的方法是
A.
分块法
B.
顺序法
C.
二分法
D.
散列法
【判断题】The end of the workpiece is clamped in a chuck; the other end of the workpiece is supported by the tailstock.
A.
正确
B.
错误
【简答题】中国当前的营养研究面临着 和 的双重挑战。
【判断题】我国迄今为止一直实行双重货币政策目标,即发展经济和稳定货币。()
A.
正确
B.
错误
【单选题】如果要求一个线性表既能较快地查找,又能适应动态变化的要求,可以采用()查找方法。
A.
分块 查找
B.
顺序 查找
C.
二分 查找
D.
散列 查找
【判断题】When the operator wants to determine the position of the workpiece on the machine , he must set the workpiece coordinate systems. Several workpiece coordinate systems can be set for one workpiece .
A.
正确
B.
错误
【单选题】原始细胞CD41阳性的急性白血病属FAB分类的哪一种
A.
ALL-L2
B.
ALL-M6
C.
ALL-M3
D.
ALL-M7
E.
ALL-M4
【简答题】设A为m×n矩阵,证明: 方程AX=E m 有解的充分必要条件为R(A)=m;
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