水稻发芽试验中,从净种子随机抽取()粒为一个重复。
参考答案:100
—Does he _______a small nose?—No, he doesn’t. He ______ a big nose.
A. has; has B. have; has C. has; have
A.a为动滑轮,B端钢缆受到滑轮组的拉力大小约为3G
B.a为动滑轮,B端钢缆受到滑轮组的拉力大小约为G
C.a、c为动滑轮,B端钢缆受到滑轮组的拉力大小约为3G
D.a、c为动滑轮,B端钢缆受到滑轮组的拉力大小约为G