【简答题】用0.2000mol/L NaOH标准溶液滴定0.2000mol/L的一元弱酸溶液,酸被中和1/2时,pH=5.00,则滴定至化学计量点时的pH=______。
【简答题】蛋白质合成后必须分选出来,定向输送到最终发挥生物功能的细胞靶部位,这一过程称为________。
【单选题】We find _____ important to use a foreign language well.
【单选题】Li Pin and I are in the same school. He is a Young Pioneer. We're good friends. Li Pin is in Class 4, and I am in Class 5. This is Li Pin's room. It's not big, but new. There is a black desk in the ro...
【判断题】当上级和职位比自己高的人走来时不需要起立迎接。
【多选题】常温时,pH=2.7的一元弱酸溶液加水稀释,若溶液体积扩大10倍,则溶液中的变化是 [ ]