单项选择题
The theory of the relationship between balance of payment and exchange rates that deals with the size of a nation's expenditures is called A、the absorption approach. B、the elasticities approach. C、the Marshall Lerner condition. D、 the exchange rate condition.
单项选择题 大调式歌曲伴奏和弦常用为:( ) A. 135、246、357 B. 613、246、357 C. 572、613、724 D. 135、461、572
问答题 保护耳朵的耳罩主要防止（ ）分贝噪音对听力的伤害。
判断题 修理尺寸法适用于任何缸体的修复
