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【单选题】
科学家做了两项实验： ①用适当浓度的生长素溶液处理未授粉的番茄花蕾子房，发育成无子番茄 ②用四倍体与二倍体西瓜杂交，获得三倍体西瓜植株，给其雌蕊授二倍体花粉，子房发育成无子西瓜 下列有关叙述正确的是（）A.
上述无子番茄性状能遗传
B.
若取无子番茄植株进行无性繁殖，长成的植株所结果实中有种子
C.
上述无子西瓜进行无性繁殖，长成的植株所结果实中有种子
D.
若取上述无子西瓜进行无性繁殖，长成的植株子房壁细胞含有四个染色体组
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【单选题】下列有关电位与电压的说法，错误的是______。
A.
某点电位是该点到零电位参考点之间的电压
B.
两点间电压即两点间电位差，与零电位参考点无关
C.
电位就是电压
D.
电位与电压的单位相同
【简答题】What is the probable relationship between the speakers? A. Fellow-travelers. B. Colleagues. C. Classmates.
【简答题】Task 3 Listen and fill in the blanks with appropriate words. Friends boyfriend and girlfriend strangers colleagu e cl assmate parents Conversation 1 Martha is Jim's(1) __________ The two people talki...
【单选题】According to Brian, people working in a team feel
A.
more responsible towards their colleagues
B.
as if they are achieving more
C.
that they are rewarded more for their work
【简答题】Before moving through to the departure lounge, Ann wants to buy some whisky for a colleague.
【单选题】Why does lan think he was successful in his first job?
A.
He communicated well with colleagues.
B.
He found a new way of doing things.
C.
He worked extremely hard.
【单选题】What, in the writer's opinion, happens to a scholar who shares his ideas with his colleagues?
A.
He gains recognition for his achievements.
B.
He attracts large numbers of students.
C.
He risks his ideas being stolen.
D.
He is considered slightly mad.
【简答题】Passage 1 Questions 1 to 5 are based on the following passage. According to Daniel Lieberman, a professor of human evolutionary biology at Harvard University, “People have been running barefoot for mi...
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