【单选题】听力原文:W: You took an optional course this semester, didn't you? How is it going? M: Terrible! It seems like the more the professor talks, the less I understand. How did the man feel about the course?
A.
He wishes to have more courses like it.
B.
He finds it hard to follow the teacher.
C.
He wishes the teacher would talk more.
D.
He doesn't like the teacher's accent.
【单选题】美国的经济学家权威密契尔说:“......近代的观点认为经济危机只不过是'商业周期'反复出现的一个特点......”导致“商业周期”反复出现的根本原因是( )
【简答题】西安园艺博览会于2011年4月28日在我国的西安召开,票价分为指定日和非指定日门票.指定日门票为150元/张,非指定日门票为100元/张.若某旅游团中有x人持有非指定日普通票,y人持有指定日门票. (1)请你用式子表示此旅游团共支付的门票费用; (2)若该旅游团中有15人持有非指定日普通票,30人持有指定日普通票时,旅游团支付的门票费用是多少?
【判断题】Thinking Cap Corp. prices its various cap designs at different price levels, ranging from $2.05 to $5.95. This is an example of optional product pricing.
【判断题】发展生产给包括人类在内的整个生态系统所带来的影响,不能超过某一个限度。()
【判断题】大肠杆菌在多种碳源同时存在的条件下,优先利用乳糖
【简答题】大肠杆菌在多种碳源同时存在的条件下,优先利用乳糖。
【简答题】汇票是由______签发的,委托付款人在见票时或在指定日期无条件支付确定金额给______或者持票人的票据。
【单选题】以下说法错误的是( )。
A.
使用 DECLARE CURSOR 语句声明游标