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The ____ expression on his face suggested that he ____ understand what I said.
1年前
Jack ,I have ________working out the math problem .
1年前
下图示意昆明市1993~2016年各月太阳辐射量变化曲线,昆明市4月接收的太阳辐射最多,其值为604.75MJ/m2;12月最少,其值为361.01MJ/m2。
1年前
1年前
I can never forget the days ________we spent together in the summer camp.
1年前