A：门齿
B：臼齿
C：犬齿
D：蝺齿
阅读下列材料，回答问题。
Take a look at the following ads! You may find some useful information you need here!
Piano lessons
Experienced musician from Australia. Good at teaching kids for 5 years!
For more information, please visit Larry's website: www.music.com.au
Lost cat
Medium size, with brown spots and white short hair. Answer you when you call it David. Many thanks for sending it back.
Call Susan at 7328059.
Guide wanted
Full time or part time.
Experience and a good knowledge of the city are necessary.
English is also a must.
Under 30 years old.
Call Mr. White at 5132683.
Apartment for sale
Three bedrooms, a kitchen and two bathrooms.
Beautiful sights out of the windows.
E-mail: sdgt@163.com.
第二次工业革命与第一次工业革命相比，其显著特点是（ ）
①近代工厂制度的确立 ②重工业时代的到来
③欧美诸国同时展开 ④科学与技术紧密结合
