第12题: [单项选择]烟酸当量计算正确的是() A. 烟酸当量(mg)=烟酸(mg)+1/60色氨酸(mg) B. 烟酸当量(mg)=烟酸(mg)+1/30色氨酸(mg) C. 烟酸当量(mg)=烟酸(mg)+1/60缬氨酸(mg) D. 烟酸当量(mg)=烟酸(mg)+1/30缬氨酸(mg) E. 烟酸当量(mg)=烟酸(mg)+1/40色氨酸(mg) 参考答案:A
第13题: [单项选择]Is it the scholarship that you got yesterday ______ makes you so happy A. which B. what C. that D. when 参考答案:C 答案解析:[考点] 定语从句 [解析] that you got yesterday是定语从句,修饰scholarship。本题中强调的是the scholarship…yesterday, 所以只能