关于生态系统的叙述,正确的是() A.生态系统中生产者得到的能量必然大于消费者得到的

题型:单项选择题

问题:

关于生态系统的叙述,正确的是()

A.生态系统中生产者得到的能量必然大于消费者得到的

B.生态系统中的信息传递对所有捕食者都必然有利的

C.生态系统的营养结构复杂程度越高其稳定性越高

D.生态系统的食物链中营养级越高的生物,其体型必然越小

考点:高中生物生态系统的结构和功能生态系统的结构和功能题库
题型:单项选择题

2012年3月31日世界自然基金会倡议全球各地的人们在当地晚20:30—21:30熄灯一小时,这就是“地球一小时”活动。据材料和下图完成有关问题。

(1)由于地球________的运动,导致全球各地熄灯并不在同一时刻,图示城市中最早和最迟关灯的城市是________、________。

(2)“地球一小时”活动期间,北京的昼夜长短情况为________。

(3)图中日界线穿过了________海峡,该海峡沟通了________洋和________洋。

(4)图中甲、乙两大洲有许多共同之处:a.都有热带雨林气候,主要位于________盆地、________平原。b.________都盛产经济作物,如咖啡、可可等。c.都以运河或海峡与其他大洲分界,其中A是________运河、B是________运河。影响两大洲阴影部分人口稀少共同的自然因素是________,乙大洲里约热内卢所在的国家人口主要分布在________。

题型:单项选择题

与巨大儿发病无关的因素是

A.孕妇及丈夫的身材高大

B.孕妇年龄增大

C.孕妇肥胖

D.孕妇在孕期体重增加明显

E.腹围增加

题型:单项选择题

“Cleverness is a gift while kindness is a choice. Gifts are easy – they’re given after all. Choices can be hard.” –– Jeff Bezos.

I got the idea to start Amazon 16 years ago. I came across the fact that the Internet usage was growing at 2,300 percent per year. I’d never seen or heard of anything that grew that fast, and the idea of building an online bookstore with millions of titles was very exciting to me. I had just turned 30 years old, and I’d been married for a year. I told my wife MacKenzie that I wanted to quit my job and go to do this crazy thing that probably wouldn’t work since most start-ups don’t, and I wasn’t sure what to expect. MacKenzie told me I should go for it. As a young boy, I’d been a garage inventor. I’d always wanted to be an inventor, and she wanted me to follow my passion.

I was working at a financial firm in New York City with a bunch of very smart people, and I had a brilliant boss that I much admired. I went to my boss and told him I wanted to start a company selling books on the Internet. He took me on a long walk in Central Park, listened carefully to me, and finally said, “That sounds like a really good idea, but it would be an even better idea for someone who didn’t already have a good job.” That logic made some sense to me, and he convinced me to think about it for 48 hours before making a final decision. Seen in that light, it really was a difficult choice, but ultimately (最后), I decided I had to give it a shot. I didn’t think I’d regret trying and failing. And I suspected I would always be haunted by a decision to not try at all.

After much consideration, I took the less safe path to follow my passion, and I’m proud of that choice. For all of us, in the end, we are our choices.

小题1:What inspired the author with the idea of building an online bookstore?

A.His dream of being an inventor.

B.The support of his wife.

C.The greatly increasing usage of the Internet.

D.Millions of exciting titles.小题2:Which of the following is closest in meaning to the underlined sentence?

A.The idea of not trying would keep coming to his mind and disturb him.

B.He would be very excited if he tried it out.

C.He would be always having a doubt if he didn’t try.

D.The decision to not try the online bookstore would terrify him.小题3:We can know from the passage that _______.

A.the boss thought the idea was suitable for the author

B.the author wanted someone else to try the idea

C.the author might not regret if he failed the idea

D.the author might go back to his boss if he failed小题4:Which of the following would be the best title for the passage?

A.Cleverness and Kindness

B.The Starting of Amazon

C.Following My Passion

D.We Are What We Choose

题型:单项选择题

男,35岁,2天前出现右周围性面瘫,但有舌前三分之二味觉丧失,同时影响哪个神经?()

A.鼓索支神经

B.舌咽神经

C.迷走神经

D.三叉神经

E.舌下神经

题型:单项选择题

涂料工程的冬期施工,当气温相当低时,可采用()施工。

A、涂料热水加温法

B、加热法

C、化学干燥法

D、紫外线固化干燥法

更多题库