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1年前
人坐在木凳上不舒服是因为人受到压强______;而坐在沙发上舒服,是因为坐在沙发上人会下陷,增大了______,人受到压强变______.
1年前
Her younger brother is _____ young to go to school. [ ]
1年前
Danny has ____ ____ ____ shoes for Li Ming. 丹尼为李明准备了一双鞋。
1年前
Mrs. Smith has a bottle of medicine named 666 POWDER FOR COLD at home. Here is the instuction of it.
1年前