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【单选题】
(1)From observing chimpanzees in the wild, Jane Goodall made two important discoveries that brought her international fame. (2)One discovery was that chimps make and use tools. (3)As Goodall looked on, for instance, several chimps plucked long blades of grass, stripped off the leaves, licked one end to make it sticky, and poked the stem into a termite nest, pulling it out covered with termites. (4)These they licked off as a child would a lollipop. (5)In addition, Goodall discovered that chimpanzees eat meat—on a regular basis. (6)Goodall frequently saw them catch, kill, and devour bushbucks and bushpigs. (7)She also saw them frequently kill and eat monkeys and young baboons. (8)Moreover, Goodall saw her chimps throw rocks and use sticks as clubbing weapons. The words that introduce the major supporting details of the passage are
A.
as, for instance, moreover .
B.
one, in addition .
C.
frequently, also .
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举一反三
【简答题】锗二极管的死区电压为 V 。
【多选题】光纤的缺点是( )
A.
造价较高
B.
整体外形大
C.
光通量小、不适宜大面积照明
D.
难以控制光束角
【简答题】果汁的分类有哪些?
【单选题】维持阴道正常酸性环境的主要菌群是
A.
葡萄球菌
B.
肠杆菌
C.
大肠埃希菌
D.
乳杆菌
【判断题】美国专家约翰于 2017 年 4 月 20 日到中国工作, 2018 年 4 月 21 日合同期满回国,在此期间该专家为中国的居民纳税义务人。
A.
正确
B.
错误
【单选题】维持阴道正常酸性环境的主要 菌群是
A.
葡萄球菌
B.
肠球菌
C.
大肠埃希菌
D.
乳杆菌
E.
棒状杆菌
【简答题】胆汁的分类有哪些?
【简答题】锗二极管的死区电压为 V,正向导通电压为 V 。
【判断题】由于承载信息的信号经过信道传输后受到了信道的影响,所以需要研究和了解信道特性。
A.
正确
B.
错误
【单选题】锗二极管的死区电压为 V,导通电压为0.3V。
A.
0.5
B.
0.7
C.
1.5
D.
0.2