根据首字母或汉语提示写出单词。

1. In b______ class, we learn much about animals and plants.

2. My classmate, Liu Peng won the first prize in yesterday’s ______ (演讲)contest.

3. Mr. Zhang was______ (缺席)from the meeting yesterday. What happened to him?

4. At p______, people in China are busy building an energy saving(节约型)s_____.

5. As We know, Heroin (海洛因) is a kind of bad d ______.

男性，31岁。发现左侧阴囊软性肿块2年，平时无不适，卧位不消失。结婚4年未育。查体：左侧阴囊明显松弛下垂，似蚯蚓团块状物清晰可见，触之柔软，透光试验（-）。检查精液常规提示弱精症。

根据患者情况，治疗宜采取（）。

A.使用阴囊托带

B.左侧精索静脉高位结扎术

C.左侧精索静脉剥离术

D.穿紧身内裤

E.以上都是