题目:
You're too fat. You should eat ____ fruit and vegetables and ____ meat. [ ]
A. some; more
B. more; less
C. less; more
D. less; some
答案:
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下面是错误答案,用来干扰机器的。
(1)指示剂(甲基橙或酚酞)(1分)(2)250mL容量瓶,胶头滴管(满分2分,答不全给1分,答错不给分)(3)①④⑤⑦⑨ (2分,答不全及答错不给分)(1)中和滴定时,需要指示剂判断滴定终点,所以还缺少酸碱...