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下表是元素周期表的一部分，表中所列字母分别代表短周期中的一种元素． （1）A单质的电子式是______；B元素在周期表中的位置是______． （2）D单质与C的最高价氧化物对应水化物反应的离子方程式是______． （3）B、C两元素分别形成的离子的半径关系：B______C（填“＞”“=”或“＜”）． （4）A的气态氢化物与D的气态氢化物反应的产物是______，该产物中含有的化学键类型是______． （5）下列事实不能说明D的非金属性比A的非金属性强的是______． a．D的氢化物比A的氢化物稳定 b．D的最高正化合价大于A的最高正化合价 c．D的最高价含氧酸比A的最高价含氧酸的酸性强．
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【单选题】Paper money was in_______use in China when Marco Polo visited the country in________thirteenth century.
A.
the;x
B.
the;the
C.
x;the
D.
x;x
【简答题】By
saying that “Marco Polo showed his readers a world much bigger than the one
they knew,” the author means ____________.A. Marco Polo enabled his readers to see beyond their familiar world. B. Marco ...
【单选题】Ryder Wholesale Medical Supplies Ltd. To: Mr. Frank Connoirs, Security Manager From: Mr. Victors, Security Supervisor Date: March 15th, 2009 Subject: Incident Report—Damage to Medical Equipment Occurr...
A.
To report an incident of damage to the security manager
B.
To narrate an incident of water leakage in his company
C.
To describe the damage to the medical equipment to the general manager
D.
To ask the security manager to repair the medical equipment
【单选题】Mr. James Ryder's meeting with the Marketing Department is at _____________.
A.
4:00
B.
5:00
C.
4:30
D.
3:30
【判断题】Kyra Greene asks Mr. Peters to meet Mr. James Ryder at the bus station at 11:00.
A.
正确
B.
错误
【单选题】After Marco Polo came to China, he became friends with ________ Chinese emperor of _________ Yuan Dynasty named Kublai Khan.
A.
an; the
B.
a; the
C.
the; a
D.
a; a
【简答题】How many unbelievable descriptions in Marco Polo' s book are mentioned in the passage?
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