皮皮学,免费搜题
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【简答题】
In 1963 a Lancaster bomber crashed on Wallis Island, a 1 in the South Pacific, a long way west of Samoa. The plane wasn ’t too badly damaged, but over the years, the crash was forgotten and the wreck remained 2 . Then in 1989, twenty-six years after the crash, the plane was accidentally rediscovered in an aerial survey of the island. By this time, a Lancaster bomber in 3 was rare and worth rescuing. The French authorities had the plane packaged and moved in parts back to France. Now a group of enthusiasts are going to have the plane restored. It has four Rolls-Royce Merlin engines, but the group will need to have only three of them rebuilt. Imagine their 4 when they broke open the packing cases and found that the fourth engine was sweet as honey -- still in perfect condition. A colony of bees had turned the engine into a hive and it was 5 in beeswax!
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【判断题】夜盲症是由于缺乏VitA。()
A.
正确
B.
错误
【简答题】VitA缺乏时有那些眼部护理措施?
【简答题】VitA缺乏时有哪些临床表现?
【简答题】What does VITA stand for? Where does VITA locate and what is its purpose?
【单选题】设整型变量a=2,则执行下列语句后,浮点型变量b的值不为0.5的是
A.
b=1/(float)a;
B.
b=1.0/a;
C.
b=(float)(1/a);
D.
b=1/(a*1.0);
【单选题】VitA缺乏可引起
A.
癞皮病
B.
夜盲症
C.
脚气病
D.
坏血病
E.
佝偻病
【单选题】设整型变量 a=2.则执行下列语句后.浮点型变量b的值不为0.5的是
A.
b=0.5
B.
(float)(1/a)
C.
b=1/(float)a
D.
b=1/(a*1.0)
【简答题】烹饪过程中维生素大致损失顺序为() A、VitC、>VitA、>VitB、1>VitE B、VitB、1>VitC、>VitE>VitA、 C、VitC、>VitE>VitA、>VitB、1 D、VitC、>VitB、1>VitA、>VitE
【简答题】设 为两个不共线的向量,那么 的充要条件是 , 的充要条件是 , 的充要条件是 .
【简答题】简述 VitA 的生理功能。