[单项选择]What makes for a successful invasion Often, the answer is to have better weapons than the enemy. And, as it is with people, so it is with plants—at least, that is the conclusion of a paper published in Biology Letters by Naomi Cappuccino, of Carleton University, and Thor Arnason, of the University of Ottawa, both in Canada.
The phenomenon of alien species popping up unexpected parts of the world has grown over the past few decades as people and goods become more mobile and plant seeds and animal larvae have hitched along for the ride. Most such aliens blend into the ecosystem in which they arrive without too much fuss. (Indeed, many probably fail to establish themselves at all—but those failures, of course, are never noticed.) Occasionally, though, something goes bananas and starts trying to take the place over, and an invasive species is born. Dr. Cappuccino and Dr. Arnason asked themselves why.
One hypothesis is that aliens leave their predators behind. Since the preda
A. gets bananas.
B. important happen.
C. becomes crazy.
D. frightening happen.

[单项选择]What makes for a successful invasion Often, the answer is to have better weapons than the enemy. And, as it is with people, so it is with plants—at least, that is the conclusion of a paper published in Biology Letters by Naomi Cappuccino, of Carleton University, and Thor Arnason, of the University of Ottawa, both in Canada.
The phenomenon of alien species popping up unexpected parts of the world has grown over the past few decades as people and goods become more mobile and plant seeds and animal larvae have hitched along for the ride. Most such aliens blend into the ecosystem in which they arrive without too much fuss. (Indeed, many probably fail to establish themselves at all—but those failures, of course, are never noticed.) Occasionally, though, something goes bananas and starts trying to take the place over, and an invasive species is born. Dr. Cappuccino and Dr. Arnason asked themselves why.
One hypothesis is that aliens leave their predators behind. Since the preda
A. plant seeds are resistant to antibiotics.
B. people tend to hitch a ride.
C. there are more circulation of goods.
D. animal larvae become stronger.

[单项选择]
What makes for a successful invasion Often, the answer is to have better weapons than the enemy. And, as it is with people, so it is with plants—at least, that is the conclusion of a paper published in Biology Letters by Naomi Cappueeino, of Carleton University, and Thor Arnason, of the University of Ottawa, both in Canada.
The phenomenon of alien species popping up unexpected parts of the world has grown over the past few decades as people and goods become more mobile and plant seeds and animal larvae have hitched along for the ride. Most such aliens blend into the ecosystem in which they arrive without too much fuss. (Indeed, many probably fail to establish themselves at all—but those failures, of course, are never noticed.) Occasionally, though, something goes bananas and starts ttarts to take the place over, and an invasive species is born. Dr. Cappuceino and Dr. Arnason asked themselves why.
One hypo
A. plant seeds are resistant to antibiotics.
B. people tend to hitch a ride.
C. there are more circulation of goods.
D. animal larvae become stronger.

[填空题]What often makes service exchanges more complicated in America than in other countries ______ and ______.

[简答题]Part 1TV Program Do you watch TV often What programs do you like Do you like watching TV with your family or friends or by yourself

[填空题] How do successful people think What drives them 【B1】. I interviewed some most successful people. Here are some keys 【B2】 success. Don’’t blame everyone from your parents to the government for your 【B3】 to get ahead. If you say someone or something outside of yourself is 【B4】 you from succeeding, you 【B5】 your power. You admit someone or something else has more control 【B6】 your life than you do. Let me take a simple example. Given up by his parents 【B7】 and labeled as a child of low mentality, Brown had every reason to lose hope. But when a high school teacher told him "【B8】 opinion of you does not have to become reality," Brown realized that his future 【B9】 his own hands. He 【B10】 and finally became a famous author and one of America’’s top speakers. The most successful people live life "on purpose"— they are doing 【B11】 they should do. Not living on purpose means 【B12】 just a little effort to 【B13】 the least amount of problems. But when you live your life on pur
A. A．distribution
B．discount
C．division
D．destination