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【多选题】
做完“二氧化碳的制取和性质”实验后，废液缸中大量的盐酸与氯化钙的混合溶液（不考虑其他杂质）。某同学处理废液时做了如下实验：取废液缸中上层清液于烧杯中，逐滴滴入Na 2 CO 3 溶液至过量。记录滴入Na 2 CO 3 溶液质量（ｘ）与有的变化关系如图所示。下列判断正确的是 [ ]A.
图中纵坐标（ｙ）表示生成CO 2 的质量
B.
反应进行到C点时，溶液中的溶质只有NaCl
C.
C点溶液的pH>7
D.
OA段发生反应的化学方程式是Na 2 CO 3 ＋2HCl===2NaCl＋H 2 O＋CO 2 ↑
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【单选题】单向琼脂扩散法是将相应的( )
A.
抗体均匀地混入琼脂糖凝胶内制板
B.
抗原均匀地混入琼脂糖凝胶内制板
C.
补体均匀地混入琼脂糖凝胶内制板
D.
抗原抗体复合物均匀地混入琼脂糖凝胶内制板
E.
抗原抗体同时均匀地混入琼脂糖凝胶内制板
【简答题】an ancient horse-drawn two-wheeled vehicle used in war
【简答题】Write out the names of transportation according to the descriptions.( 根据描述写出下列交通工具) 1. underground railway in a city ( ) 2. two-wheeled vehicle, using pedals to drive it along ( ) 3. large ...
【判断题】A motorcycle is a two-wheeled vehicle used mainly for human transportation.
A.
正确
B.
错误
【简答题】Study the following passages and point out what type of diction each chiefly depends on. 1.The moped (i.e. a small two-wheeled vehicle with an engine) wasn't much to look at, but it ran. The tires wer...
【简答题】two-wheeled vehicle, using pedals to drive it along。
【简答题】The Segway Human Transporter was invented by Dean Kamen．It is a two-wheeled vehicle designed for a single rider standing upright over its single axle（轴） and navigate using a set of handlebars resembli...
【判断题】Henry Ford first built a two-wheeled vehicle with engine and built
the world first four-wheeled motor vehicle in the year of 1886.
A.
正确
B.
错误
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