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【单选题】
依《国旗法》规定,下半旗时,应当先将国旗升至杆顶,然后降至旗顶与杆顶之间的距离为旗杆全长的( )处
A.
四分之一
B.
三分之一
C.
二分之一
D.
四分之三
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【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. [     ]
A.
Do, watch insects
B.
Are, watching insects
C.
Did, watch insects
【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.
【单选题】下列关于感受器电位的特点是
A.
具有局部电位的性质
B.
与动作电位的发生部位是同一个地方
C.
是“全或无”的
D.
不衰减传导
【单选题】In many countries insects are not eaten because ______.
A.
insects are very dirty
B.
insects are very ugly
C.
insects are very difficult to digest
D.
A and
【单选题】钢筋混凝土预制桩桩身的混凝土强度应达到设计强度的( )时才能运输。
A.
0.75
B.
0.8
C.
0.9
D.
1
【单选题】(真题2011-S2) 自发性气胸最常见的症状是
A.
呕吐
B.
心悸
C.
发热
D.
胸痛
E.
咳嗽
【单选题】适合在砂土上栽培的作物是 ( )
A.
棉花
B.
玉米
C.
花生
D.
果树
【单选题】钢筋混凝土预制桩桩身的混凝土强度应达到设计强度的( )时才能运输。
A.
75%
B.
80%
C.
90%
D.
100%
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