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【简答题】
Skin-diving(潜泳) is a new sport today. This sport take you into a wonderful new world. It is like a visit to the moon! When you are under water, it is easy for you to climb big rocks, because you are on longer heavy. Here, under water, everything is blue and green. During the day, there is plenty of light. When fish swims nearby, you can catch them with your hands. When you have tanks(罐) of air on your back, you can stay in deep water for a long time. But you must be careful when you dive in deep water. To catch fish is one of the most interesting parts of this sport. Besides, there are more uses for Skin-diving. You can clean ships without taking them out of the water. You can get many things from the deep sea. Now you can see that Skin-diving is both useful and interesting. 小题1: Skin-diving can take you to _________. A.an exciting world B.a new world C.a beautiful world D.an interesting and new world 小题2: This sport _________. A.is like to travel on the moon B.is like to play in water C.is like to visit a new country D.is like to climb a big rock 小题3:You can stay in deep water for a long time because __________. A.you can swim B.you can take tanks of air with you C.you can bring something to eat D.you can skin diving 小题4:Which of the following statements is NOT true ? A.Skin-diving is a new sport. B.Skin-diving is like visiting the moon C.The only use of skin-diving is to have more fun. D.Skin-diving is not only interesting but useful. 小题5: Skin-diving is a useful and interesting sport because __________. A.you can catch fish with your hands B.you can clean the ship in the water C.you can get many things from the deep sea D.all of the above
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参考答案:
举一反三
【单选题】一类环境钢筋混凝土梁的混凝土保护层最小取下列哪项( )。
A.
20mm
B.
25mm
C.
30mm
D.
35mm
【简答题】由对流换热微分方程知,该式中没有出现流速,有人因此得出结论:表面传热系数h与流体速度场无关。试判断这种说法的正确性?
【单选题】“恻隐之心,仁之端也”是谁提出来的?
A.
孔子
B.
孟子
C.
荀子
D.
朱子
【判断题】由对流换热微分方程知, 该式中没有出现流速,有人因此得出结论:表面传热系数h与流体速度场无关。
A.
正确
B.
错误
【单选题】一类环境中,C30钢筋混凝土梁的保护层厚度最小取()
A.
15mm
B.
20mm
C.
25mm
D.
30mm
【多选题】下列有关保护层的描述,错误的是()。
A.
对最外层钢筋具有防锈、防火及防腐作用
B.
能够保证钢筋与混凝土之间的有效粘结
C.
一类环境(一般地上环境)钢筋混凝土梁纵向受力钢筋外表面到梁表面的最小距离为保护层厚度
D.
按规范规定,二a类环境(一般地下环境),混凝土强度等级为C25的钢筋混凝土梁,其钢筋保护层厚度可以取25mm
【单选题】一类环境中,钢筋混凝土梁的保护层厚度最小取( )
A.
15mm
B.
20mm
C.
25mm
D.
30mm
【单选题】一类环境中, 钢筋混凝土梁的保护层厚度最小取( )
A.
15mm
B.
25mm
C.
20mm
D.
30mm
【判断题】由该对流换热微分方程可知,该式中没有出现流速,因而可以说,表面传热系数与流体速度场无关。
A.
正确
B.
错误
【单选题】“恻隐之心,仁之端也”是谁提出来的?
A.
孔子
B.
孟子
C.
荀子
D.
朱子
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