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【单选题】
已知MnO 2 (s) = MnO(s) + 1/2 O 2 (g) Δ 1 H m Ө = 134.8 kJ·mol -1 MnO 2 (s) + Mn(s) = 2MnO(s) Δ 2 H m Ө = -250.1 kJ·mol -1 则MnO 2 的标准摩尔生成焓Δ r H m Ө /kJ·mol -1 为( )
A.
519.7
B.
317.5
C.
-519.7
D.
-317.5
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【简答题】Task 4 Thomas of Anderson Trading Co. is calling Lin Fang's company. Listen to the conversation and decide whether the following statement are true(T) or false(F). Thomas is calling to enquire about t...
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【单选题】对 do-while 语句描述正确的是 ( )。
A.
do-while 语句构成的循环可以使用 break 语句退出循环
B.
do-while 语句构成的循环必须使用 break 语句退出循环
C.
do-while 语句构成的循环 ， 当 while 中的表达式值为非零时结束循环
D.
do_while 的循环体 可以 无条件执行 多次
查看完整题目与答案
【单选题】下列各项中属于一级科目的是( )。
A.
未分配利润
B.
提取盈余公积
C.
投入资本
D.
材料采购
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【单选题】Usually, it is the shipper’s duty to ______ delivery of the goods on time and the consignee has to ______ delivery at the destination when the goods arrive.
A.
make,take
B.
effect, make
C.
effect, do
D.
take, effect
查看完整题目与答案
【判断题】In theory, d/ A is more convenient for the buyer than d/p, because by d/ A , the buyer can take delivery of the goods after acceptance, and he can usually pay for the goods after the goods resale wit...
A.
正确
B.
错误
查看完整题目与答案
【单选题】Message delivery is the communication method between objects. An object request services from another object by sending messages. A message usually includes: ________
A.
message-sender ’ s identification, operation name and necessary parameters
B.
the class names of message-sender and message-receiver
C.
message-receiver ’ s identification, operation name and necessary parameters
D.
the class name of the message-receiver
查看完整题目与答案
【简答题】Mail Delivery Please complete the conversation by filling in the missing words and expressions. (C= Clerk, G= Guest) C: Good afternoon, sir. Is there anything I can do for you? G: Good afternoon> I’d ...
查看完整题目与答案
【单选题】Renaissance is an extension of the Middle Ages, and is bridged by the Age of Enlightenment to modern history.
A.
T
B.
F
查看完整题目与答案
【简答题】对do-while语句描述正确的是().
查看完整题目与答案
【单选题】对 do-while 语句描述正确的是 ( )。
A.
do-while 语句构成的循环可以使用 break 语句退出循环
B.
do-while 语句构成的循环必须使用 break 语句退出循环
C.
do-while 语句构成的循环 ， 当 while 中的表达式值为非零时结束循环
D.
do_while 的循环体 可以 无条件执行 多次
查看完整题目与答案
相关题目：
【简答题】Task 4 Thomas of Anderson Trading Co. is calling Lin Fang's company. Listen to the conversation and decide whether the following statement are true(T) or false(F). Thomas is calling to enquire about t...
查看完整题目与答案
【单选题】对 do-while 语句描述正确的是 ( )。
A.
do-while 语句构成的循环可以使用 break 语句退出循环
B.
do-while 语句构成的循环必须使用 break 语句退出循环
C.
do-while 语句构成的循环 ， 当 while 中的表达式值为非零时结束循环
D.
do_while 的循环体 可以 无条件执行 多次
查看完整题目与答案
【单选题】下列各项中属于一级科目的是( )。
A.
未分配利润
B.
提取盈余公积
C.
投入资本
D.
材料采购
查看完整题目与答案
【单选题】Usually, it is the shipper’s duty to ______ delivery of the goods on time and the consignee has to ______ delivery at the destination when the goods arrive.
A.
make,take
B.
effect, make
C.
effect, do
D.
take, effect
查看完整题目与答案
【判断题】In theory, d/ A is more convenient for the buyer than d/p, because by d/ A , the buyer can take delivery of the goods after acceptance, and he can usually pay for the goods after the goods resale wit...
A.
正确
B.
错误
查看完整题目与答案
【单选题】Message delivery is the communication method between objects. An object request services from another object by sending messages. A message usually includes: ________
A.
message-sender ’ s identification, operation name and necessary parameters
B.
the class names of message-sender and message-receiver
C.
message-receiver ’ s identification, operation name and necessary parameters
D.
the class name of the message-receiver
查看完整题目与答案
【简答题】Mail Delivery Please complete the conversation by filling in the missing words and expressions. (C= Clerk, G= Guest) C: Good afternoon, sir. Is there anything I can do for you? G: Good afternoon> I’d ...
查看完整题目与答案
【单选题】Renaissance is an extension of the Middle Ages, and is bridged by the Age of Enlightenment to modern history.
A.
T
B.
F
查看完整题目与答案
【简答题】对do-while语句描述正确的是().
查看完整题目与答案
【单选题】对 do-while 语句描述正确的是 ( )。
A.
do-while 语句构成的循环可以使用 break 语句退出循环
B.
do-while 语句构成的循环必须使用 break 语句退出循环
C.
do-while 语句构成的循环 ， 当 while 中的表达式值为非零时结束循环
D.
do_while 的循环体 可以 无条件执行 多次
查看完整题目与答案
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