50 years'time 可不可以写成50-year time

50 years'time 可不可以写成50-year time what's the exact time 可不可以写成what time is the exact it? 你什么时候起床可不可以写成what time do you to get up 话题作文可不可以写成记叙文 牛顿第一定律可不可以写成牛顿定律 话题作文可不可以写成记叙文?.. tear-drop可不可以写成teardrop? Na+可不可以写成钠阳离子? in five years' time In ten years' time,perhaps Cindy will _____ 50 kIn ten years' time,perhaps Cindy will _____ 50 kilogrames.(weight). students are going to take the test in two days' time.可不可以写成The students are going to take the test in two days. “告诫”这个词可不可以写成告戒 请问比可不可以写成分数形式? dy/dx可不可以写成(d/dx)y C6H5CH=CH2可不可以写成C6H5C2H3,为什么 可不可以写成took no long before? h2so4可不可以写成s03·h20? classes begin可不可以写成 begin the classes