下列哪个选项不能提高程序的性能A．不要在循环中创建和释放对象 B．在处理字符串时尽量

根据句意及首字母（汉语）提示，补全单词

1. —I was late because I had o    _      and missed the train this morning.

    —You shouldn't watch too much TV last night.

2. The children r_____ out of the classroom at the end of their lesson.

3. —Dad, my suitcase won't l    _      because it is too full.

    —Don't worry, I can help you.

4.  My far away uncle is my nearest ______ (亲属), so I must go to see him during the summer holiday

every year.

5.  Billy             (打破) a glass through carelessness the day before yesterday, so he felt stressed out.

现代生物技术的核心是克隆技术。 [ ]

过盈连接是依靠（）传递外载荷。

A.压力

B.弹性变形

C.结合面间摩擦或力矩

D.塑性变形

液压泵能够吸入液体的外部条件是油箱内液体绝对压力必须（）大气压力。

A、小于

B、等于

C、大于

D、大于或等于

交叉耐药性