正确答案: C

你来，他也来

题目："并非'如果你来，他就不来'。"由此可知( )。

解析："并非'如果你来，他就不来'。"是指原命题"如果你来，他就不来"的负命题，也是就是这句话翻译过来是你来且他来，即肯前否后。故选择C项。

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学习资料的答案和解析：

[单选题]朱老师一边讲课，一边观察学生的反应，这反映了注意的那种特性？( )

注意分配

解析：注意的分配是指在同一时间内，把注意指向不同的对象，同时从事着几种不同的活动。注意的广度，也称注意的范围，是指在同一时间内，意识所能清楚地把握的对象数量。注意的稳定性是指注意集中在一定对象上的持续时间。注意的转移是个体根据新的任务，主动把注意由一个对象转移到另一个对象上。本题朱老师一边讲课，一边观察学生的反应体现的是注意的分配。

[单选题]小学生在学习拼音的时候，如果还同时学习英语字母和单词，那么对英语的学习可能会干扰拼音的学习效果，这属于( )。

负迁移

解析：正迁移指一种学习对另一种学习的积极影响。负迁移指一种学习对另一种学习的消极影响。顺向迁移是指先前学习对后继学习产生的影响。逆向迁移是指后继学习对先前学习产生的影响。由于学习拼音和学习英语字母和单词是同时的，所以不会出现顺向迁移和逆向迁移，而英语的学习可能会干扰对拼音的学习效果，故明显属于负迁移。

[单选题]在李老师的课堂上，学生常常随意插嘴，还会故意捣乱，李老师常常无奈停止讲课，来维持课堂秩序。李老师的课堂表现出了( )的课堂气氛。

对抗

解析：课堂气氛主要包括三种类型：①积极的课堂气氛，基本特征是课堂情境符合学生的求知欲和心理特点，师生之间、学生之间关系正常、和谐，学生产生满意、愉快、羡慕、互谅、互助等积极的态度和体验。②消极的课堂气氛，基本特征是课堂情境不能满足学生的学习需要，脱离了学生的心理特点，师生关系不融洽，学生之间不友好，学生产生了不满意、烦闷、厌恶、恐惧、紧张、焦虑等消极的态度和体验。③对抗的课堂气氛。对抗的课堂气氛是失控的气氛，主要表现为学生过度兴奋、各行其是、随便插嘴、故意捣乱。教师无法正常上课，时常被学生打断或不得不停下来维持课堂秩序。李老师的课堂表现出了对抗的课堂气氛。

[单选题]22.请阅读Passage 2,完成第1～5小题。 　　Passage 2 　　Birds are a critical part of our ecological system.But more than ever,birds are threatened byhuman pollution and climate change. 　　We need the birds to eat insects,move seeds and pollen around,transfer nutrients from sea toland,clean up after the mass death of the annual Pacific salmon runs,or when a wild animal falls anywhere in a field or forest. 　　How could we enjoy spring without the birds fiitting busily in our garden or dropping by to check out the fiowers in our urban window box? Can you “contemplate” America without the soaring bald eagle,or even those scavengers like the pigeons and gulls that clean up discarded food scrapson our city streets and waterfronts? How diminished our lives would be without “them”? 　　Scavenging eagles and condors need hunters to behave responsibly and bury,or remove,theremains of any shot deer peppered with fragments of lead bullets.loons,ducks and other water birds will be poISOned by lead bullets and lead fishing sinkers if we allow such objects to drop intheir feeding space. 　　All sea and shore birds,even the puffins and guillemots of the otherwise pristine Aleutians,need us to make sure that no other heavy metals,like mercury and cadmium,are dumped in rivers and make their way across the oceans. 　　Birds like the terns,knots and shearwaters that migrate between the far north and deep,deep,south of our planet need people everywhere to cease and desist from filling in their wetland fuelstops and rest stations,and from constructing golfing resorts and factories in their feeding and breeding grounds. 　　Seabirds are among the most endangered vertebrate species on the planet,with the International Union for Conservation of Nature classifying 97 species as globally threatened,and 17 in thehighest category of critically threatened.Of greatest concern are the pelicans of the southern oceans and the spectacular,but slow-breeding albatross. 　　Plastic bags must be eliminated from natural environments so sea and shore birds don'tmistakenly carry such debris back to feed their chicks,with invariably lethal consequences.The albatross,cormorants and herons need us to stop over-fishing and compromising their normal foodsupply. 　　The pelicans,pengujns and all the birds that inhabit,or visit,our coastlines need us to ensurethat we do not dump oil into gulfs and bays,or release so much carbon dioxide into the atmospherethat the oceans turn acidic and we lose the mussels and oysters,the mass of calcareous plankton thatfeeds so many creatures,and the coral reefs that nurture enormous numbers of edible species. 　　Think about it:We share this small green planet.As they fly,feed and nest,the birds monitorthe health of the natural world for us,provided that we,in turn,make the effort to access that keyinformation.The birds and humans are both large,complex and ultimately vulnerable organisms that inhabitthe top ofthe food chain.At the end of the day,their fate will be our fate.

Which of the following is closest in meaning to the underlined word“contemplate” in PARAGRAPH THREE?

Think about.

解析：词汇题。根据第三段可知，作者的目的是让读者想象没有鸟类的生活会变成什么样，故推测contemplate的意思为“考虑，思量”。故本题选B。