【名词&注释】
风媒传粉(anemophilous pollination)、羽状复叶(pinnately compound leaf)
[单选题]胡桃科植物适应风媒传粉的特征是( )。①乔木②羽状复叶③基底胎座④花单性⑤雄花排成下垂的柔荑花序⑥无花冠⑦子房下位⑧花柱羽毛状
A. ①③④⑤
B. ②⑤⑥⑦
C. ③④⑤⑥
D. ④⑤⑥⑧
查看答案&解析
举一反三：
[单选题]What is the woman going to do this Saturday?
A. Drink tea
B. Attend a party
C. Meet old friends
[单选题]DMy father was 44 and knew he wasn’t going to male it to 45. He wrote me a letter and hoped that something in it would help me for the rest of my life.
A. Since the day 1 was 12 and first read his letter, some of his words have lived in my
B. beart. One it aways times out. “Right now, you are pretending to be a time-killer. But I know that one hay, you will do something great that will set you among the very best.” Knowing that my dad believed in me gave me permission to believe in myself. “You will do something great.” He didn’t know what that would be, and neither did I, but at times in my life when I’ve felt proud of myself, I remember his words and wish he were here so I could ask. “Is this what you were talking about, Dad? Should I keep going?”
C. A long way frim 12 now, I realize hew would have been proud when I made any progress. Lately, thongn. I’ve come to believe he’d want me to move on to winat com next: to be nrood of and believe in, somebody else. It’s time to start writing my own letters to my children. Our children look to us with the same unanswered question we had. Our kids don’t hold back because they’re afraid to fail. They’re only afraid of failing us. They don’t worry about being disappointed. Their fear－as mine was until my father’s letter－is of being a disappointment.
D. Give your chikdren permission to succeed. They’re witing for you to believe in them. I always knew way parents loved me. But trust my That elic will be more comlece, that love will be more real, and their belief in the nelces whi be greater if you write the words on their hearts; “Don’t worry; you’ll do something great.” Not having that blessing from their parents may be the only thing holding them back.
E. 68.We learn from the text that the author .
F. lost his father when he was young
G. worked hard before he read his father’s letter
H. asked his father permission to believe in himself
I. knew execty at thing his father wanted him to do
[单选题]49
A. year
B. month
C. week
D. day
[单选题]How did Ma Shwe manage to save her calf from the fast-flowing water?
A. By putting it on a safe spot. B． By pressing it against her body.
B. By taking it away with her. D． By carrying it on her back.
[单选题]杨柳科具有的胎座类型是( )。
A. 边缘胎座
B. 侧膜胎座
C. 中轴胎座
D. 基生胎座
[单选题]EAll too often , a choice that seems sustainable（可持续的）turns out on closer examination to be problematic. Probably the best example is the rush to produce ethanol（乙醇）for fuel from corn . Corn is a renewable resource —you can harvest it and grow more, almost limitlessly . So replacing gas with corn ethanol seems like a great idea .
A. One might get a bit more energy out of the ethanol than that used to make it, which could still make ethanol more sustainable than gas generally, but that’s not the end of the problem. Using corn to make ethanol means less corn is left to feed animals and people, which drives up the cost of food. That result leads to turning the fallow land — including, in some cases, rain forest in places such as Brazil — into farmland, which in turn gives off lots of carbon dioxide（CO2）into the air. Finally, over many years, the energy benefit from burning ethanol would make up for the forest loss. But by then, climate change would have progressed so far that it might not help.
B. You cannot really declare any practice “sustainable” until you have done a complete lift-cycle analysis of its environmental（环境的）costs. Even then, technology and public policy keep developing, and that development can lead to unforeseen and undesired results. The admirable goal of living sustainable requires plenty of thought on an ongoing basis.
C. 57. What might directly cause the loss of the forest according to the text?
D. The growing demand for energy to make ethanol.
E. The increasing carbon dioxide in the air.
F. The greater need for farmland.
G. The big change in weather.
[单选题]She stared at the painting, wondering where sheit.
A. saw
B. has seen
C. sees
D. had seen
[单选题]What feature of “body language”mentioned in the passage is common to both humans and animals?
A. Lifting beads when sad.
B. Keeping long faces when angry.
C. Bristling hair when ready to attack.
D. Bowing heads when willing to obey.
[单选题]This printer is of good quality. If it _______ break down within the first year, we would repair it at our expense.
A. would
B. should
C. could
D. might
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