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To find out how the name Canada came about, we must go back to the 16th century. At that time, the French dreamed of discovering and controlling more land across the world. In 1535 Francois I, King of France, ordered a navigator (航海家) named Jacques Cartier to explore the New world and search for a passage to India. Cartier first arrived at the Gulf of the St. Lawrence, which he wanted to explore. He did not know what to expect but he hoped that this Gulf was just an arm of the ocean between two islands. If it was, he would soon be on his way to the Far East. So he sailed upwards along the St. Lawrence River. However, instead of reaching Asia he arrived at Quebec or Stadacona, as the Indians called it. It was at this point that the term “Canada” entered the country’s history. Clearly the word “Canada” came from an Indian word “Kanata”, which means village. Cartier first used it when he referred to Stadacona or Quebec. What a huge “village” Canada is! 57. What was Cartier ordered to do? A. To build a new country B. To find the New World C. To get in touch with the American Indians D. To know more about America and find a new way to Asia 58. When Cartier reached the Gulf of St. Lawrence he hoped ________. A. he had got to the Far East             B. it was a water way to the New World C. it was a water way to the Far East       D. he had sailed into the Pacific 59. Which of the following is TRUE according to the passage? A. Quebec and Stadacona were tow islands. B. The Indian language for village is Stadacona. C. Quebec and Stadacona were two villages in Canada. D. Stadacona was what the Indians called Quebec. 60. Canada was first used to refer to __________. A. Asia     B. the New World       C. a village         D. Quebec
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【单选题】与静息电位形成有关的因素是
A.
细胞内K+ 浓度高于细胞外
B.
静息时膜对K+ 通透性大
C.
静息时膜对Na+ 通透性极小
D.
细胞内带负电荷的有机物不能通过细胞膜
E.
以上都是
【单选题】麻疹最常见的并发症是
A.
肺炎
B.
麻疹脑炎
C.
喉炎
D.
心肌炎
E.
急性胰腺炎
【简答题】称取钢样 0.500g ,溶解后定量转入 100mL 容量瓶中,稀释至刻度。 从中移取 20.0mL 试液置于 100mL 容量瓶中,将其中 Mn 2+ 的氧化为 MnO 4 - ,稀释至刻度,摇匀。于 520nm 处用 2cm 吸收池测量吸光度 A = 0.460 ,计算钢样中 Mn 的质量分数。( M Mn = 54.94 , κ 52 0 nm = 2.30×10 3 L·mol -1 ·c...
【单选题】麻疹最常见的并发症是
A.
急性胰腺炎
B.
肺炎
C.
麻疹脑炎
D.
喉炎
E.
心肌炎
【多选题】关于神经纤维静息电位的形成机制与下列因素有关
A.
细胞外K浓度小于细胞内的浓度
B.
细胞膜主要对K有通透性
C.
细胞膜主要对Na有通透性
D.
细胞内外K浓度差加大可使静息电位加大
E.
加大细胞外K浓度,会使静息电位减小
【多选题】与静息电位形成有关的因素有
A.
细胞外钠离子浓度高
B.
静息时细胞膜对钾离子通透性大
C.
钾离子外流
D.
静息时细胞膜对钠离子通透性小
E.
细胞内带负电荷的蛋白质不能穿过细胞膜
【单选题】下列操作不能达到实验目的的是 目的 操作
A.
在溶液中将MnO 4 - 完全转化为Mn 2+ 向酸性KMnO 4 溶液中滴加溶液至紫色消失
B.
除去KNO 3 中少量NaCl 将混合物制成热的饱和溶液,冷却结晶,过滤
C.
配制980mL0.1mol/LCuSO 4 溶液 将25.0gCuSO 4 ·5H 2 O溶于水配制成1L溶液
D.
确定蔗糖是否水解 取水解液滴加少量新制的Cu(OH) 2 悬浊液,加热
【判断题】语句“IF [#1LE360] GOTO70” 也可写成“IF [#1LT360] GOTO70”,最终效果相同。
A.
正确
B.
错误
【单选题】麻疹最常见的并发症是
A.
喉炎
B.
肺炎
C.
心肌炎
D.
脑炎
E.
营养不良及维生素 A 缺乏症
【简答题】(10分)已知KMnO 4 、MnO 2 在酸性条件下均能将草酸钠(Na 2 C 2 O 4 )氧化: 2MnO 4 - +5C 2 O 4 2 - +16H + =2Mn 2 + +10CO 2 ↑+8H 2 O MnO 2 +C 2 O 4 2 - +4H + =Mn 2 + +2CO 2 ↑+2H 2 O 某研究小组为测定某软锰矿中MnO 2 的质量分数,准确称取1.20g软锰矿样品,加入2...
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