Granny often tells us ______ water in our daily life.
A. save
B. saving
C. to save
D. saves
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I think _____ difficult for us to learn a foreign language well in a short time.
A. that
B. this
C. one
D. it
一维谐振子的能级是均匀分布的。()
A. 对
B. 错
热拌沥青混合料复压时,一般碾压( )遍。
A. 1-2
B. 2-3
C. 3-4
D. 4-6
宋朝欧阳修以来,()不属于“小学”的内容。
A. 音韵
B. 训诂
C. 礼教
D. 文字