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Animal moms are great moms. You might be surprised at some of these moms. Octopuses (章鱼) The mother octopus lays about 50,000 eggs. For about 300 days, she stays with the eggs, cleans them and protects them. She does not leave to feed. However, this animal mom dies as soon as the eggs are hatched (孵化). Crocodiles(鳄鱼) A crocodile mother puts a lot of time and effort into raising her babies. She starts by building a nest (巢), which she guards for over two months! When the eggs are ready to hatch, the young crocs call out to their mother, who digs them out and helps them hatch. She then carries them in her mouth down to the water, where she will guard them for several more weeks or months until they learn to hunt on their own. Bats (蝙蝠) Bats become moms by hanging head up in a cave, giving birth. Catching the youngster before it can fall to the ground below, she puts it in a pouch (育儿袋). Bat moms may carry babies with them when feeding for the first few days. As the little bats get bigger and heavier, moms help them hang on the wall of their caves and return often to feed them. It continues for about three weeks, until the babies are grown up and able to fly on their own. Koalas (考拉) The animal mom gives birth after a pregnancy (怀孕期) of only 35 days. The hairless baby climbs into its mother’s pouch and lives there for another five months. When the little koala is between five and eight months old, it leaves the pouch for short periods of time but returns for safety. Once it is too big to return to the pouch, it will climb onto its mother’s back and ride there until it is about 12 months old. 小题1:Which animal moms die when their babies are born? A.Octopuses. B.Crocodiles. C.Bats. D.Koalas. 小题2:A crocodile mother usually carries her baby to the water _____. A.in her mouth B.on her back C.in her pouch D.by her tail 小题3:A bat mom _____. A.gives birth by lying in the nest B.gives birth by hanging in a cave C.leaves its babies in the pouch for months D.lets its babies live on their own after birth 小题4:How long does the bat mom help to feed her babies? A.About 3 days B.About 3 weeks C.About 13 weeks D.About 3 months 小题5:How long does a young koala usually stay with its mom? A.35 days. B.5 months. C.8 months. D.12 months.
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【多选题】在Solidworks软件爆炸视图的爆炸设定中可以精确地定位爆炸的以下哪些项目:
A.
爆炸的时间
B.
爆炸的方向
C.
爆炸的距离
D.
爆炸的线宽
E.
爆炸的图层
【单选题】(2015 河池 ) 不漏气的橡皮氢气球由地面上升过程中,球内气体的质量与密度的变化情况是 ( )
A.
质量增加,密度增加
B.
质量不变,密度减小
C.
质量减小,密度减小
D.
质量不变,密度不变
【判断题】在Solidworks软件爆炸视图的爆炸设定操作的要点,要注意顺序。先单击“应用”按钮,能够看到设定的结果,再单击“完成”按钮,就完成这个爆炸步骤的操作。
A.
正确
B.
错误
【多选题】根据规范的规定:安装在室内的10kV装配式高压电容器组,下层电容器的底部距地面应不小于0.2m,上层电容器的底部距地面不宜大于2.5m,电容器布置不宜超过三层。其理由是 。
A.
下层电容器底部距地距离是考虑电容器的通风散热
B.
上层电容器底部距地距离是为了便于电容器的安装、巡视和搬运检修
C.
便于接线,三层布置是目前单相电容器在室内的常用布置形式
D.
为了布置整齐、美观好看
【单选题】小儿所需要的营养素中,适当能量做多的同时为能量主要来源的营养素是( )
A.
能量
B.
维生素
C.
D.
膳食纤维
E.
矿物质
【判断题】在Solidworks软件爆炸视图的重新定位就是按照我们需要的位置、顺序自动完成。
A.
正确
B.
错误
【单选题】不漏气的橡皮氢气球由地面上升过程中,下列关于球内气体的质量与密度的说法,正确的是( )
A.
质量不变,密度增加
B.
质量不变,密度减小
C.
质量增加,密度不变
D.
质量减小,密度不变
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A.
正确
B.
错误
【简答题】食物中能提供人体能量的营养素是____、 ____、____,三大 营养素中能量系数最高的是____ ,其中____ 是人体做主要的能量来源。
【单选题】小儿所需要的营养素中,适当能量做多的同时为能量主要来源的营养素是( )
A.
B.
维生素
C.
D.
膳食纤维
E.
矿物质
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