请你写出一个单项式，使它的系数为-1，次数为3．答：．（答案不唯一）

根据下列句子所给首字母在横线上写出空缺处各单词的正确形式。（每空只写一词）

小题1:He drew a ____________（结论）after a lot of experiments.

小题2:Word came that our football team was _____________ （打败）again.      

小题3:Who do you think is to ____________（该受指责）for the accident?

小题4:What he did was not ________ （与……一致）with what he said.

小题5:England is divided __________ (粗略地) into three zones.

小题6:At first my new __________ (环境) were difficult to tolerate.

小题7:If it is _____________（方便的）to you I’ll be with you next Tuesday.

小题8: Please ________（安排） for a taxi to pick me up at six o’clock.

小题9:To their __________（高兴）, their son was admitted into a famous university.

小题10:Wang Ping ________(系好) my safety belt and showed me how to use the hovering carriage.

小题11: Being ______（暴露）to sunlight for too much time will do harm to one’s skin.

小题12:With extra evidence John Snow was able to______(宣布) with certainty that polluted water carried the virus.

小题13:For historical__________ (建筑) ,you have to go to older but smaller towns built by the Romans.

小题14:Just as I tried to make the necessary ________(调整)to this new situation, Wang Ping appeared.

小题15:Westminster Abbey contains ________(雕塑) in memory of dead poets and writers.

很多时候，政策及政策建议的基础不过是主观的信念。所以，究竟是需求管理政策更好，还是供给刺激政策更好，不大容易判断。问题的关键在于，这个“好”是指什么？是从多长的时间尺度考虑的？凯恩斯当年为自己的政策建议辩护时说过一句名言：“我们迟早都是要死的”。这话引人深思。
对本段文字的主旨理解最准确的一项是______。

A．社会科学领域中本不存在绝对的客观真理
B．政策的好坏不过是主观的信念
C．需求管理政策和供给刺激政策的好坏没有定论
D．社会管理政策应该因时、因事而定

用高倍显微镜观察洋葱根尖细胞的有丝分裂。下列描述正确的是[ ]

A．处于分裂间期和中期的细胞数目大致相等

B．视野中不同细胞的染色体数目可能不相等

C．观察处于分裂中期的细胞，可清晰地看到赤道板和染色体

D．细胞是独立分裂的，因此可选一个细胞持续观察它的整个分裂过程

Instead of sending _____ e-mail, Nancy talks with her mother on _____ mobile phone once a week. [ ]

A. the; a

B. an; the

C. an; /

D. the; an

学校实施德育的基本途径是（　　）。

A．教学活动

B．社会活动

C．课外、校外活动

D．共青团少先队活动