【单选题】听力原文: Former President of Russia Yeltsin, who died of a heart attack Monday at 76, will be buried at Moscow's historic Novodevichy Cemetery, Wednesday, following memorial ceremonies in the golden-dome...
A.
Former President of Russia Yeltsin died of a heart attack at 76.
B.
Bill Clinton and his wife are expected to attend on behalf of the United States.
C.
Ordinary Russians can pay their last respects to Mr. Yeltsin.
D.
Putin declared Wednesday a national day of mourning across Russia.
【简答题】下列叙述正确的是 A.将5.85 g NaCl晶体溶入100 mL水中,制得0.10 mol/L的NaCl溶液 B.将25 g无水CuSO 4 溶于水制成100 mL溶液,其浓度为1 mol/L C.将 w g a %的NaCl溶液蒸发掉 g水,可得到2 a %的NaCl溶液( >2 a %) D.将1体积 c 1 mol/L的硫酸用水稀释为5体积,所得稀溶液的浓度为0.2 c 1 mol/L