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【单选题】
关于五氯化磷 (PCl5),下列说法中不正确的是
A.
它由氯与 PCl3 反应制得
B.
它容易水解生成磷酸 (H3PO4)
C.
它在气态时很稳定
D.
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【判断题】现金流量表反映了一段时间内客户家庭的收支状况,习惯上一般以一个自然年为一个编制周期。( )
A.
正确
B.
错误
【单选题】What can Campus Pipeline Solutions provide?
A.
Online registration.
B.
E-business applications.
C.
Taculty administrations.
【单选题】儿童脑细胞的耗氧量约为全身耗氧量的
A.
20%
B.
30%
C.
40%
D.
50%
【单选题】What does the writer conclude about e-mail in the last paragraph?
A.
It has already made life a lot easier for many businesses.
B.
It is not being used enough in business today.
C.
It will never replace written communication.
D.
It is really useful when people use it properly.
【单选题】What makes e-mail extremely popular on campus is most likely its ______.
A.
chance to revive the almost lost art of letter writing
B.
freedom from face-to-face confrontation or pressure to respond
C.
global quality for one to contact people half a world away
D.
liberation from such restraints as time and locality
【简答题】在圆柱或圆锥外表面上形成的螺纹称 ,在其内孔表面上所形成的螺纹称 。
【判断题】净利润是指营业利润减去销售费用、管理费用、财务费用和所得税费用后得到的净额。( )
A.
正确
B.
错误
【单选题】儿童脑细胞的耗氧量约为全身耗氧量的
A.
30%
B.
40%
C.
50%
D.
60%
【简答题】______是指在Java程序中用synchronized(Object语句指定的对象上设置的锁。
【简答题】java程序中的对象锁是一各独占的 锁A. 排他
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