2023-06-15
下列物质，沸点最高的是（）
A.戊烷
B.2-甲基戊烷
C.2，2-二甲基丁烷
D.己烷
D
锅炉炉水化验含盐量偏高通常应（）。
2024-01-13 竞赛及其他题库
水管锅炉后排的沸水管比烟管炉的烟管换热效果好是因为（）。
Students need to buy insurance by themselves once enrolled in British universities and it is a compulsory requirement for every student.。
Now there is a collection of free-to-air，free-to-view and subscription services over a variety of distribution media in the U.K..。
Around 1905，（）， or 5-cent movie theaters， began to offer an easy and inexpensive way for the public to watch movies in America.
（） is a typical reality TV show in America.
The Walt Disney’s studio is a famous U.S.company， specializing in（）.
For most British people， most days begin with a look at the morning newspaper and a cup of coffee.。
In Britain， freedom of the press is protected， though there is still censorship of the press.。
The Beatles， who helped to secure a major place for its country in the development of pop and rock music is an American band.。
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