多项选择题 扶肋木挺髋练习动作要领和注意事项?A. 面朝前双手扶肋木蹲下,做向前挺髋练习B. 注意双手握的距离稍开,蹲下时放松,髋关节发力快,动作幅度大

未知题型 The advantage of 'drip' coffee makers shown in the text is that ______.A.they are much more economicB.they can produce only one cupC.they are more convenient and easier to operateD.they are more economical

未知题型 The word 'it' in Line 3, Para 3 probably refers to ______.A.the lidB.coffee -makerC.the brewing processD.the model