“让”字是____结构,音节是____。
—I'm not good at basketball,you know.
—________.We are playing for fun. Just try and you'll see you can.( )
直线2x+ay﹣2=0与直线ax+(a+4)y﹣4=0平行,则a的值为____
在等腰三角形ABC中,∠A=100°,则∠B=____ 度。
蛋白质开始消化的部位是( )