A, It reduces the pain
B. It exercises the body
C. It improves the body's immune system
D. It can cure cancer
67.The writer's attitude towards laughter is _____
A .Critical
B. Doubtful
C. Positive
D. Negative
E
Winter begins in the north on December 22nd. People and animals have been doing what they always do to prepare for the colder months. Squirrels(松鼠), for example,
have been busy gathering nuts from trees. Well, scientists have been busy gathering information about what the squirrels do with the food they collect.
They examined differences between red squirrels and gray squirrels in the American state of Indiana. The scientists wanted to show how these differences could affect the growth of black walnut(黑胡桃)trees. The black walnuts is the nut of choice for both kinds of squirrels. The black walnut tree is also a central part of some hardwood forests.
Rob Swihart of Purdue University did the study with Jake Goheen, a former Purdue student now at the University of New Mexico. The two researches estimate(估计)that several times as many walnuts grow when gathered by gray squirrels as compared to red squirrels. Gray squirrels and red squirrels do not store nuts and seeds in the same way. Gray squirrels bury nuts one at a time in a number of places. But they seldom remember where they buried every nut. So some nuts remain in the ground. Conditions are right for them to develop and grow the following spring. Red squirrels, however, store large groups of nuts above ground. Professor Swihart calls "death traps for seeds".
【湖北省武汉市汉铁高级中学2016-2017学年高一12月月考英语试题】相关文章:
★ 河北省保定市高阳中学2017-2017学年高一12月月考英语试题
★ 浙江省东阳中学2016-2017学年高一12月月考英语试题
★ 湖北省襄阳市致远中学2016-2017学年高一12月月考英语试题
★ 湖南省常德市淮阳中学2017-2017学年高一上学期期中考试英语试题
★ 湖北省武汉市汉铁高级中学2017-2017学年高一上学期第一次月考英语试题(新疆班,无答案)
★ 陕西省宝鸡园丁中学2017-2017学年高一10月月考英语试题1
★ 安徽省泗县双语中学2016-2017学年高一12月月考英语试题
★ 河北省唐山市开滦二中2016-2017学年高一12月月考英语试题
★ 河北省定州二中2016-2017学年高一4月月考英语试卷
★ 重庆市第十八中学2017-2017学年高一10月月考英语试题
最新
2019-11-15
2019-11-15
2019-11-14
2019-11-14
2019-11-11
2019-11-11