小儿开始认识母亲,见奶瓶表示喜悦的年龄是()
A.2个月
B.3个月
C.4~5个月
D.6~7个月
E.1~1岁半
参考答案:C
根据句意及汉语提示完成句子。
1. New York is a great place _____ (看) films.
2. We sent a card with _____ (圣诞) greetings.
3. Nie'er was a famous _____ (音乐家).
4. _____ (记得) to bring your book here.
5. She dressed in the _____ (最新的) Paris fashion.
6. Try to _____ (描述) exactly how it happened.
7. Read the text, and then answer the _____ (下面的) questions.
8. She went to Beijing three years _____ (后) .
在用压系统稳定工作时,泵出口压力()
A、大于作动筒压力油压力
B、等于作动筒压力油压力
C、等于作动筒的推力被有效面积除
D、由作动筒的输出速度确定