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【单选题】
Elephants are the biggest animals that live on land (some whales are bigger than elephants but whales live in the sea), when born a baby elephant weighs 91 kilograms. That is the weight of a grown man. It is about 91 centimeters high. When it reaches the age of six years, it is about 183 centimeters high. (30) When it reaches the age of twelve years, it does not grow any more. It may then be 320 centimeters high. African elephants are bigger than Indian elephants. African elephants have much bigger ears. Elephants have very long noses which we call 'trunks'. No other animals have trunks as long as elephants. An elephant can use its trunk to smell things and it can also pick up things with the tip of its trunk. The tip of its trunk can be used like a hand. An elephant uses its trunk to feed itself. It likes to eat leaves, young juicy branches of a tree and fruit. It picks these with its trunk and puts the food into its mouth. When it wants a drink, it puts the tip of its trunk into water. It fills its trunk with water and then blows the water into the mouth. The elephant washes itself in the same way. It fills its trunk with water and then blows the water over itself. Two of the elephant's teeth are very long and strong. They are called 'tusks'. They use their tusks to dig up small trees and to dig in the ground for water. Elephants also use their tusks to lift heavy logs of wood. In some countries men catch wild elephants and teach them to work. After a while they are no longer wild. They become tame. They become very obedient. They do what their masters tell them to do. All day long they work patiently in the hot sun. They pull trees along and lift heavy logs. No animal is stronger than an elephant. Elephants have very strong legs. Their legs are like trees. They usually walk slowly because they are so big, but they walk very quietly. The biggest animals in the world live______.
A.
on land
B.
both on land and in the sea
C.
in the sea
D.
in the forests
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【单选题】电路中,已知a点电位为2V,b点电位为-3V, 若以b点为参考点,则a点电位变为( )V。
A.
5
B.
2
C.
3
【单选题】电路中,已知a点电位为2V,b点电位为-3V, 若以a点为参考点,则b点电位变为( )V。
A.
-5
B.
2
C.
3
【单选题】预应力筋的张拉力、张拉或放张顺序及张拉工艺应符合规定,下列规定中错误的是()
A.
当施工需要超张拉时,最大张拉应力不应大于国家现行标准的规定
B.
张拉工艺应能保证同一束中各根预应力筋的应力均匀一致
C.
后张法施工中,当预应力筋是逐根或逐束张拉时,应保证各阶段不出现对结构不利的应力状态;同时宜考虑先批张拉预应力筋所产生的结构构件的弹性压缩对后批张拉预应力筋的影响,确定张拉力
D.
先张法预应力筋放张时,使各根预应力筋同时缓慢放松
【多选题】可以调用哪些方法在Canvas画布中绘制矩形
A.
rect()
B.
strokeRect()
C.
fillRect()
D.
clearRect()
【单选题】监理工程师直接向分包人发布了错误指令,分包人经承包人确认后实施,但该错误指令导致分包工程返工,为此分包人向承包人提出费用索赔,承包人( )。
A.
以不属于自己的原因拒绝索赔要求
B.
认为要求合理,先行支付后再向业主索赔
C.
暂不予支付,以自己的名义向业主索赔后再支付
D.
暂不予支付,以分包商的名义向业主索赔后再支付
【简答题】确定后张法施工预应力筋的张拉顺序时,应考虑______、______的原则。
【单选题】监理人直接向分包人发布了错误指令,分包人经承包人确认后实施,但该错误指令导致分包工程返工,为此分包人向承包人提出费用索赔,承包人( )。
A.
以不属于自己的原因拒绝索赔要求
B.
认为要求合理,先行支付后再向业主索赔
C.
不予支付,以自己的名义向工程师提交索赔报告
D.
不予支付,以分包商的名义向工程师提交索赔报告
【单选题】施工单位负责人接到施工现场发生安全事故的报告后,应当在( )小时内向事故发生地有关部门报告。
A.
1
B.
5
C.
12
D.
24
【判断题】确定后张法施工预应力筋的张拉顺序时,应考虑分批和对称的原则。
A.
正确
B.
错误
【单选题】电路中,已知 a 点电位为 2V , b 点电位为- 3V , 若以 b 点为参考点,则 a 点电位变为( ) V 。
A.
- 5
B.
5
C.
- 3
D.
3
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