下面有关生物学核心概念的说法和理解错误的是（ ） A．生态系统就是一定区域内生物
题型：选择题
问题：
下面有关生物学核心概念的说法和理解错误的是（ ）
A．生态系统就是一定区域内生物与环境形成的统一的整体
B．相对性状就是指生物同一性状的不同的表现形式
C．条件反射是一种复杂反射，是生来就有的反射
D．光合作用不但为自身提供能量也为其他生物提供能量
题型：选择题
D
When a storm is coming, most people leave the area as quickly as possible and head for safety…B
ut there are a few people who will get into their cars and go straight for the center of the storm．These people are willing to risk (冒…危险) being killed by floods or 100-Kilometer- an-hour winds for the excitement of watching the storm close up．
“Storm chasing (追逐)”is becoming an increasingly popular hobby (喜好) ，especially in the Midwest of the United States, where there are frequent storms between March and July．A storm chaser begins the day by checking the Internet for the latest weather reports, and then drives up to l,000 kilometers to where the storm will be and waits for it to develop．
Although anyone can do it，storm chasing is extremely dangerous．The power of a big storm can throw a cow into the air or destroy a whole house in seconds．Storm chasers are also often hurt in accidents caused by driving in a heavy rain．If you are a beginner, it is much safer to join a group for storm - chasing vacations during the storm season．
Even then，storm chasing is not all adventure and excitement．“Storm chasing is 95％driving，”says Daniel Lynch，who spends most of his summer storm-chasing．“Sometimes you
Can sit around for hours waiting for something to happen，and all you get is blue sky and a few light showers.”
However，for storm chasers，it is all worth it. “When you get close to a storm，it is the most exciting sight you will ever see in your life，”says Jasper Morley．“Every storm is an example of the power of nature．It is the greatest show on Earth．”
57．For storm chasing，the first thing storm chasers do is to ．
A．head straight for the center of the storm
B．get into the car for safety
C．wait patiently for the storm to develop
D．collect information about a coming storm
58．Beginners of storm chasing are advised_______
A．not to drive in a heavy rain
B．to do it in an organized way
C．not to get too close to a storm
D．to spend more time on it in summer
59．By saying“it is all worth it”in the last paragraph，the author means that______
A．storm chasing costs a lot of money
B．storm chasing is worth hours of waiting
C．efforts in storm chasing are well paid
D．a storm presents the greatest show on Earth
60．What can we learn from the text?
A．Sometimes storm chasers get nothing but disappointment．
B．Many storm chasers get killed in the storms．
C．Storm chasing is becoming popular around the world．
D．Storm chasing is only fit for young people