A. The man has left a good impression on her family. B. The man can dress casu
A. The man has left a good impression on her family.
B. The man can dress casually for the occasion.
C. The man should buy himself a new suit.
D. The man's jeans and T-shirts are stylish.
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关于消费者物价指数CPI，下列表述不正确的是（）。
A. 是反映一定时期内城乡居民所购买的生活消费品价格和服务项目价格变动趋势和程度的相对数
B. 通常作为观察通货膨胀水平的重要指标
C. 当一国的CPI下降时，表明该国的通货膨胀率下降，该国货币的实际购买力下降
D. 如果CPI升幅过大，表明通胀已经成为经济不稳定因素〖=2〗
在非水滴定法中配制HClO4的冰醋酸溶液需加入计量的醋酐，其目的是______。测定盐酸麻黄碱时常加入______，其目的是______。
反相HPLC常用的固定相是______，流动相是______，这时候混合样品中极性大的组分______(填先或后)出柱。
According to Jeff Gilbert, the "advisory" classes at Hillsdale were set up so that students could ______.
A. tell their teachers what they did on weekends
B. experience a great deal of pleasure in learning
C. maintain closer relationship with their teachers
D. tackle the demanding biology and physics courses
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