问题
单项选择题
制备胶剂时，为降低胶块黏度，便于切胶，常加入
A．明矾
B．黄酒
C．麻油
D．冰糖
E．水
答案
参考答案：C
解析：各选项均为胶剂的常用辅料，其中A明矾可沉淀胶液中的泥砂杂质；B黄酒起矫味、矫臭作用；D冰糖可增加胶剂的透明度和硬度，并有矫味作用；E水为煎煮的溶剂；只有C麻油可降低胶块的黏度，便于切胶。因此C正确。
搜题请搜索小程序“爱下问搜题”
制备胶剂时，为降低胶块黏度，便于切胶，常加入
A．明矾
B．黄酒
C．麻油
D．冰糖
E．水
参考答案：C
解析：各选项均为胶剂的常用辅料，其中A明矾可沉淀胶液中的泥砂杂质；B黄酒起矫味、矫臭作用；D冰糖可增加胶剂的透明度和硬度，并有矫味作用；E水为煎煮的溶剂；只有C麻油可降低胶块的黏度，便于切胶。因此C正确。
用下列方框中所给动词(组)的适当形式填空: (每小题1分，共7分)
1. The governor demanded that all the homeless children __________________ by psychologists after the earthquake. 2. My camera can ________________________to take pictures in cloudy or sunny conditions. 3. —Who is the man talking to Mr. Smith, the host of Shanghai TV? — A local journalist ______________________ the earthquake and Tsunami in Japan. 4. —I told you to bring a dictionary with you before school was over. —I am sorry, but this morning I was in such a hurry that I forgot _____________________ that. 5. The year 2010 __________________increasing unemployment in that country as a result of global economic crisis. 6. Many people were said to _____________to the hills to escape the fighting between different political parties. 7. This passage is too long. In my opinion, these four sentences require _______________. |
