帮忙解答下面的问题，急！！

1. 帮忙解答下面的问题，急！！

解答：

纸张在杯沿的部分完全和水接触，隔绝了空气，这样大气压力作用在纸张上面，就相当于给杯子加了个盖子，而水给纸张向下的压力 小于大气压力，所水就不会倒出来了。
这是物理原理，大概初中二年级会学到的。

2. 求下面这些问题的答案，很急，万分谢谢！！

1:   法国 昆虫  法布尔 人性  虫性  虫性  社会人  昆虫的史诗

 2：甲虫     蜗牛和小昆虫 
 3：注入毒液，等毒液把猎物消化成液体后，直接吸食
 4：注射毒液麻醉猎物，把肉变成流质的肉汁，然后吮吸。
 5:  潮湿温暖草木繁盛
 6:  受呼吸器官支配，实际是氧化反应，可调控。
 7:  有发光细胞，内有萤光素和萤光素酶。荧光素和ATP在荧光素酶和Mg2+催化下产生荧光素腺苷      酸. 荧光素腺苷酸和氧气反应产生激发态的氧化荧光素和一磷酸腺苷。 激发态的氧化荧光素回到基态，并发出绿光。
 8:  D
 9:  红蚂蚁是靠视觉记忆的。
10:  C
11: 蟑螂、蟋蟀      1/12        
12: 上颚   
13: 用腿
14: 敏锐的味觉
15:（1）当卵孵化出幼虫后，初龄幼虫即蛀入树干，最初在树皮下取食，待龄期增大后，即钻入木质部为害
(2) 幼虫在树干内活动，蛀食隧道的形状和长短随种类而异
(3) 幼虫在树干或枝条上蛀食,在一定距离内向树皮上开口作为通气孔,向外推出排泄物和木屑幼虫老熟后即筑成较宽的蛹室,两端以纤维和木屑堵塞，而在其中化蛹。
(4) 化蛹前向外钻一孔道，在树内化蛹，新羽化的成虫经此孔道而出。
16: 在有阳光时能照到洞口，保持干燥。在下雨时雨水难以流入洞里

3. 求这些问题急！

1.1 Group B are in the control group.
1.2 Eating crabby patties with the new sauce is the independent cariable.
1.3 The gas production is the dependent variable.
1.4 Because the 8 people don't always have gas problem, they just have a history of gas problem.
 
2.1 Gary is suffering form slimotosis.
2.2 Rubbing seaweed on the shell and drinking Dr. Kelp are the independent variable.
2.3 The slime is gone and Gary's shell smells better is the dependent variable.
2.4 Either Rubbing seaweed on the shell or drinking Dr. Kelp should be working and both of them may work.
 
3.1 SpongeBob is in the control group.
3.2 With arms and back lathered in the musele cream is the independent variable.
3.3 The amount of a person's musele is the dependent variable.
3.4 The musele cream is not working should be Larry's conclusion.
 
4.1 Patrick's hypothesis was that fish that eat food exposed to microwaves will become smater and would be able to swim through a maze faster.
4.2 The fishs in te regular food group are in the control group.
4.3 Feeding the special food to fish is the independent variable.
4.4 The time of a fish swim through a maze is the dependent variable.
4.5 The fish that eat food exposed to microwaves will become smater and would be able to swim through a maze faster.

4. 这到题的解答！急！

标准答案

5. 中间一题求解答！急啊！

面积=10²π÷4=78.5

6. 求解答这个题~~谢谢啦！

采纳一下谢谢

7. 这题求解！急急！

∵AB=AC，∠BAC=120°，
∴∠B=∠C=30°，
连接AD，
∵DE垂直平分AB，
∴AD=BD，
∴∠BAD=∠B=30°，
∴∠CAD=120°-30°=90°，
∴AD是RTΔADC锐角30°所对的直角边，
∴CD=2AD=2BD。
即DC=2BD

8. 求解题！急急急！