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【单选题】
下面不属于完整性范畴的是( )
A.
主码约束
B.
外码约束
C.
断言
D.
强制存取权限控制
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参考答案:
举一反三
【单选题】下列关于计算机病毒说法错误的是 。
A.
有些病毒仅能攻击某一种操作系统,如Windows
B.
病毒一般附着在其他应用程序之后
C.
每种病毒都会给用户造成严重后果
D.
有些病毒能损坏计算机硬件
【单选题】下列各项中,属于消费税应税消费品的是( )。
A.
高档化妆品
B.
高档手机
C.
高档照相机
D.
高档西服
【单选题】What should I do if I can't find the proper meaning of a word listed on the preview worksheet?
A.
Just let go. Sometimes the dictionary does not include all the usages of a word and we can figure out the metaphorical meaning by ourselves.
B.
always look it up in the English-English dictionary (Cambridge, Longman, Oxford, Collins, freedic, etc.)  and it is just a matter of time before you get what you want. Do it meticulously and you won't regret it.
C.
Just randomly choose one from the definition of that word.
D.
Give up and let jessie give us the correct answer later on.
【单选题】根据Courtesy原则,选出下列表述中更为恰当的一句
A.
We can't deliver all the goods in one lot.
B.
We regret to inform you that we can't deliver all the goods in one lot.
【多选题】高等学校预算包括( )。
A.
收入预算
B.
支出预算
C.
估计预算
D.
审计预算
【简答题】翻译下列还盘信函: Dear sirs, We are very pleased to receive your offer dated Sep.9 for copy paper No.DA500 A47-1.But we regret to inform you that your price is out of line with the market here. As the current...
【单选题】Read the following paragraph and answer the question below."Chasing money in our 20s and 30s can lead to grief build up in our 40s as we spend more time reflecting and contemplating on the past," acco...
A.
We can't go back our time.
B.
Life is short.
C.
Life goes without regret.
D.
Life changes a lot.
【单选题】在每日膳食中,鲜蔬菜类食物宜多选( )
A.
豆荚菜
B.
绿叶蔬菜
C.
根茎菜
D.
瓜果类
【多选题】GFE(L)1 型雷达的电源分系统的开关电源盒为整机提供( )直流电源 ( 不包括发射机的高压电源 ) 。
A.
± 15V
B.
+12V
C.
-12V
D.
+5V
【单选题】一般地,蜂鸣器属于哪种负载?
A.
电阻性负载
B.
电感性负载
C.
电容性负载
D.
不导电负载
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