题目

从100g10%NaCl的溶液中倒出10g，则剩下的90gNaCl溶液中溶质的质量分数为 A. 1%   B. 90%   C. 10%   D.11.1%                            （    ） 答案：C--- Joan, what_________in your hand?　　--- Look! It's a birthday gift for my grandmother.A．had you heldB．are you holdingC．do you holdD．will you hold