选择合理焊接顺序可以防止或减小焊接()。
A、断裂
B、变形
C、稳定性
D、缺陷
参考答案:B
从Ⅱ栏中找出I栏中各句的应答语。
Ⅰ
( )1. What time is it?
( )2. Do you take a bus to school?
( )3. Does Ann have lunch at school?
( )4. When do you read English?
( )5. What time do you go to bed?
Ⅱ
A. At about ten o'clock.
B. No, she doesn't. She has it at home.
C. Yes, I do.
D. In the morning.
E. It's eight o'clock.
下列阶层中,由市民阶级分化出来的有
①农民②手工业者③商人④封建主⑤银行家 [ ]
A.①②③
B.②③⑤
C.③④⑤
D.①③⑤