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【简答题】
阅读理解。 Death Valley is one of the most famous deserts in the United States, covering a wide area with its alkali sand. Almost 20 percent of this area is well below sea level, and Badwater, a salt water pool, is about 280 feet below sea level and the lowest point in the United States. Long ago the Panamint Indians called this place “Tomesha”- the land of fire. Death Valley's present name dates back to 1849, when a group of miners coming across from Nevada became lost in its unpleasantness and hugeness and their adventure turned out to be a sad story. Today Death Valley has been declared a National Monument and is crossed by several well-marked roads where good services can be found easily. Luckily the change created by human settlement has hardly ruined the special beauty of this place. Here nature created a lot of surprising scenes, almost like the sights on the moon, ever-changing as the frequent wind moves the sand about, showing the most unusual colors. One of the most astonishing and colorful parts of Death Valley is the Devil's Golf Course, where it seems hard for one to tell reality from dreams. Sand sculptures stand-on a frightening ground, as evening shadows move and lengthen. 1.The name “Death valley” comes from _____. A. an Indian name B. the death of the miners C. the local people D. a National Monument 2. From the passage we can learn that _____. A. no one had ever known the desert before the miners B. it's still not easy to travel across the desert C. people can find gas-stations, cafes and hotels in the desert D. people have changed the natural sight of the desert 3. The Devil's Golf Course is famous for _____. A. the terrible sights B. the moon-like sights C. the dream-like sights D. the ever-changing sights 4. From the passage we can see that the writer _____ the Death Valley . A. appreciates B. is fearful of C. dislikes D. is tired of
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举一反三
【多选题】操纵子的启动序列
A.
位于转录起始点上游-10及-35区域的共有序列
B.
-10区域即Pribnow盒
C.
-10区域是TATAAT序列
D.
有保守序列,与RNA聚合酶结合牢固
E.
-35区域通常是TTGACA序列
【简答题】人的心理过程包括()过程、情绪情感过程和意志过程。
【简答题】大肠杆菌乳糖操纵子的启动序列上游有
【单选题】关于操纵子的启动序列,正确的叙述是
A.
位于操纵子的第一个结构基因处
B.
属于负性顺式调节元件
C.
能编码阻遏蛋白
D.
能与RNA聚合酶结合
E.
发挥作用的方式与方向无关
【单选题】对操纵子的启动序列,描述错误的是
A.
包含转录起始点上游-10及-35区域的共有序列
B.
-10区域即TATA盒
C.
-10区域即 TATAAT序列
D.
有保守序列,与RNA聚合酶结合牢固
E.
-35区域通常是 TTGACA序列
【判断题】在运动中最常导致骨折的暴力一般为直接暴力。
A.
正确
B.
错误
【简答题】某操纵子的启动子区序列中存在Q、R、S、T、U几个位点,但启动子和操纵基因的确切位置并不清楚。实验中分离出5种缺失突变体如下(///表示缺失区域): 缺失③和④能够产生组成型水平的操纵子RNA,缺失①无法产生RNA,那么操纵基因与启动子位于何处?
【简答题】人的心理过程包括气质、注意、人性心理特征。( )
【单选题】宪法实施监督机制不包括( )。
A.
社会保障机制
B.
政策保障机制
C.
匿名举报机制
D.
立法监督机制
【单选题】乳糖操纵子中与启动序列结合的是
A.
阻遏蛋白
B.
RNA聚合酶
C.
cAMP
D.
CAP
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