A:pH=3的盐酸和pH=11的氨水等体积混合
B:pH=3的盐酸和pH=11的氢氧化钡溶液等体积混合
C:pH=3的醋酸和pH=11的氢氧化钡溶液等体积混合
D:pH=3的硫酸和pH=11的氨水等体积混合
“西气东输”工程起止点为( )
给下列字组词
蔓____ 漫____
笼____ 茏____
“一带一路”即“新丝绸之路经济带”和“21世纪海上丝绸之路”,是******提出的战略构想,旨在借用古代“丝绸之路”的符号,沟通历史与未来,连接中国与世界.古代丝绸之路经过的地方有( )
选择正确的图画,把图画的序号填在括号内
①This is a monkey. It has a long tail. It's thin. ____
②Look at the giraffe . It has long legs and a small head. It's so tall. ____
③This is a panda.It has big eyes and a short tail. It's black and white.____
④Look at the elephant. It has a big body and a long nose. It is so fat.____
⑤I have a duck. It has a big mouth. It's small.____