我国著名的黄牛品种有()、()、()、()、()等。
参考答案:秦川牛;南阳牛;鲁西牛;晋南牛;延边牛
从考古发掘中的遣唐使的遇难船上看,日本使者在漂洋过海时面临凶险。但隋唐时期,日本在长达300年的时间里,不断向中国派遣使节。主要原因是 [ ]
A.日本善于学习外国
B.日本发展落后
C.日本和中国同处东亚,一衣带水
D.吸收先进文化,促进自身发展
—John, what was your sister doing while you _____ the piano?
—Oh, she _____ with toys.[ ]
A. played; played
B. played; was playing
C. were playing; played
D. were playing; was playing