The tropical year differs from which year by 20 minutes （).A.Astronomical yearB.Natural ye

The closed－loop system differs from the open－loop system by .

According to the author, competition differs from conflict in that______.A．it results in w

_______ fashion differs from country to country may reflect the cultural differences from one aspect

189. What will man be like in the future—in 5,000 or even 50,000 years from now？ We can only make a guess, of course, but we can be sure that he will be different from what he is today. For man is slo

The technology of freezing stem cells from differ

Which one is different from the others according