正确答案:

题目：保管合同只能是有偿合同。

解析：×

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举一反三的答案和解析：

[单选题]

areB． were

解析：读懂该句可知，此处缺少一个“是”动词。此题测试对于英文中“是”动词单复数的基本掌握情况。因该句的主语为which cities，因此应选are与其匹配。此题有可能错选is。注意先确定主语的单复数，后确定动词的单复数。

[单选题]事物的性质主要是由( )

矛盾的主要方面决定的

解析：

A【解析】矛盾双方地位具有不平衡性，有主要方面和次要方面之分。处于支配地位起着主导作用的方面是矛盾的主要方面，而处于被支配地位的方面为矛盾的次要方面，事物的性质主要是由矛盾的主要方面决定的。故选“A”。

[单选题]You can assume that if all the females in a large pack had pups, ______.

most of the pups would starve

解析：按照第二段的说法。野狗是群居动物。一只母狗会一次生16只小狗，一群当中如有几只母狗同时生小狗的话，那就会很多。但按它们的习性，一群狗中只有一只母狗给小狗喂奶。可以想象，一只母狗是喂不过来的。

[单选题]我国现代小说家创作了《阿Q正传》、《狂人日记》、《祝福》等一系列反映五四前后社会现实的优秀作品。（ ）

鲁迅

[单选题]There are advantages and disadvantages to 21 Asian and Western educational method. For example, one advantage 22 the education in Japan is that students there learn much more math and science 23 American students. They also study more hours each day than Americans 24 . The study is difficult, but it 25 students for a society that values discipline (纪律) and self-control. There is, however, a disadvantage. Memorization is an important learning method in Japanese schools, 26 many students say that after an exam, they forget much of the information that they have memorized.The advantage to the education in North America, 27 the other hand, is that students learn to think by themselves. The system prepares them for a society that values 28 ideas. There is, however, a disadvantage. When students graduate from high school, they haven't memorized 29 many basic rules and facts as students in other countries 30 .

both

解析：答案为C。词组“both... and...”表示“两者都……”，此处谈论的是亚洲和西方教育方法的优缺点。not only应与but also连用；all表示“三者以上”。

[单选题]高渗性缺水患者，输液治疗首选（ ）

5%葡萄糖注射液

[单选题]第 2 题 与演替过程中的群落相比，顶极群落的特征是（　　）

稳定性高

[单选题]

suburban

解析：此题测试理解、辨词和推理能力。在该句中，英文around them，意为“在它们周围”，及下旬中around the city，意为“在城市周围”都提示了．此处的填充词应表达一个“郊区的”的意思。但如没有掌握英文suburban一词，可用排除法。city为“城市”，urban为“城市的”，countryside 为“农村”，因而只剩一个suburban，它必定是答案。