皮皮学,免费搜题
登录
搜题
【简答题】
Jungle(丛林) country is not friendly to man,but it is possible to survive there. You must have the right equipment and you must know a few important things about woodcraft(山林野外知识). Then your chances of staying alive are very good. No one should go into the jungle without the right equipment. You need lightweight clothing, a good knife, and a compass. Fishhooks and a line,a rifle,matches in a waterproof container and a poncho(雨披) are necessary too. So is a mosquito net(蚊帐) to protect the head. In the jungle you can get hopelessly lost within five minutes after leaving known landmark(地界碑). That is why you should always carry a compass. In open country during the day, you can tell which way to go by studying the sun. At night the stars are sure guides to direction. But in most places the jungle rooftop is so thick that it is impossible to see the sun or the stars. Again and again you must check your position by the compass. Keep alert(警惕的). Watch the ground in front of you carefully. Stop and listen now and again. Avoid haste(匆忙), and rest often. In a place that is hot and humid(潮湿的), the person who sets a fast pace will soon become tired. A steady and even pace is wisest in the long run. If you lose your way, don't panic. Try to decide how long it has been since you were sure of your position. Mark the spot where you are with blazes on a tree. Put them on four sides of the tree, so that you will be able to see them from any direction. Then you can begin retracing your steps (going back exactly the way you have come), knowing that you can always find the spot from which you started. Except in an emergency, never try to travel the jungle at night. Whenever possible, it is wise to follow streams and rivers that are going in your general direction. This may cause you many extra miles of travel. But in the end it will save time and energy. Nothing is more exhausting (extremely tiring) than hacking (cutting) a way through unbroken jungle. Surviving in the jungle is a science. The jungle people have become perfect in this science, and you can too. Learn as much as you can about what to expect in the jungle. Make sure you have the right equipment. Then no part of the jungle will seem completely or frightening. In fact, you will be able to “live off” it for a long time. 小题1:To keep alive in the jungle, you should make it clear that the right equipment is _________. A.more important than a knowledge of woodcraft B.less important than a knowledge of woodcraft C.just as important as a knowledge of woodcraft D.not as important as a knowledge of woodcraft 小题2:If you lose your way in the jungle, which of the following can NOT be done? A.Check your position by the compass again and again. B.Decide how long ago it was that you got lost. C.Tell which way to go by studying the sun/the stars. D.Mark blazes on four sides of a tree and be sure to see them from any direction. 小题3:The author is strongly against traveling at night probably because __________. A.one tends to move too slowly at night B.some animals will attack you C.emergencies occur most frequently at night D.it is more difficult to check your position 小题4:“It is wise to follow streams and rivers”, which will ensure you to _________. A.avoid animals’ attacks B.save many extra miles of travel C.avoid hacking a way through unbroken jungle D.have a rich supply of drinking water
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【单选题】下列不能用 NaOH 直接滴定的弱酸为 ( )
A.
H 3 BO 3 ( Ka 1 =5.8 × 10 -10 )
B.
HAc ( Ka 1 =1.8 × 10 -5 )
C.
H 2 CO 3 ( Ka 1 =4.2 × 10 -7 )
D.
H 2 C 2 O 4 ( Ka 1 =5.9 × 10 -2 )
【单选题】请看泰文“ปวดหัว”,并听以下录音选择正确的中文意思。
A.
胃痛
B.
脚痛
C.
头痛
D.
肚子痛
【简答题】在电子商务营销模式中,交易的供需信息都是通过互联网发布的,双方的信息沟通具有()和()的特点。
【单选题】请选择正确的头文件
A.
include
B.
#include stdio.h
C.
#include
D.
#include[stdio.h]
【单选题】在电子商务营销模式中,交易的供需信息都是通过互联网发布的,双方的信息沟通具有( )和( )的特点。
A.
安全;诚信
B.
快速;高效
C.
缓慢;低效
D.
方便;高速
【简答题】(Ⅰ)将铜丝的一端绕成螺旋状,在酒精灯外焰加热,冷却后变黑。再在酒精灯上将该铜丝加热至红热状态。 如右图所示,趁热插入到试管里的氯化铵晶体中,在试管中出现白烟。冷却后取出铜丝,可看到铜丝变成光亮的紫红色。回答下列问题: ⑴解释“当红热的铜丝插入氯化铵晶体中,出现白烟”的原因(用化学方程式表示) 。 ⑵灼热的氧化铜在氯化铵中变成单质铜,写出该反应的化学方程式 。 ( II)2008年,我国的航天事业...
【判断题】小叶性肺炎多发于年老体弱患者。
A.
正确
B.
错误
【多选题】下列关于硼酸滴定的说法正确的是( )。
A.
硼酸为弱酸,不能用 NaOH 进行准确滴定;
B.
向硼酸溶液中加入 甘油,使其与硼酸根形成稳定的配合物,可以增加硼酸在水溶液中的离解,使硼酸转变为中强酸,用 NaOH 进行滴定。
C.
硼酸可以采用 NaOH 直接进行滴定;
D.
向硼酸溶液中加入 甘油,可以使硼酸转变为它的共轭碱,用 NaOH 进行准确滴定。
【简答题】(10分)(Ⅰ)将铜丝的一端绕成螺旋状,在酒精灯外焰加热,冷却后变黑。再在酒精灯上将该铜丝加热至红热状态。 如右图所示,趁热插入到试管里的氯化铵晶体中,在试管中出现白烟。冷却后取出铜丝,可看到铜丝变成光亮的紫红色。回答下列问题: ⑴解释“当红热的铜丝插入氯化铵晶体中,出现白烟”的原因(用化学方程式表示) 。 ⑵灼热的氧化铜在氯化铵中变成单质铜,写出该反应的化学方程式 。 ( II)2008年,我国...
【简答题】兴奋性突触后电位是发生在突触后膜上的局部________极化。
相关题目: