【简答题】A.Because the insects are the most successful creatures. B.Because the insects give birth all the time. C.Because the insects can adapt to new situations quickly. D.Because the insects were the first ...
【单选题】____________ they ____________ in the forest? Yes, they are. [ ]
【判断题】放大电路必须设置合适的静态工作点才可能正常工作。
【单选题】Which of the following is not true about insects?
A.
Insects can see more colours than human beings.
B.
Insects can see ultraviolet rays which are invisible to man.
C.
All insects have their favorite colours.
D.
The world is more colorful to insects than to human beings.
【单选题】Which of the following is NOT true about insects?
A.
Insects can see more colours than human beings.
B.
Insects can see ultraviolet rays which are invisible to men.
C.
All insects have their favorite colours.
D.
The world is more colorful to insects than to human beings.
【判断题】甲醛对健康的危害有刺激作用、致敏作用、致突变作用。
【单选题】In many countries insects are not eaten because ______.
A.
insects are very dirty
C.
insects are very difficult to digest
【单选题】In the war, a soldier’s life is full of ________.