下列各项操作错误的是[ ] A．用酒精萃取溴水中的溴单质可选用分液漏斗，而后静置

微生物鉴定自动化方法主要有（）

A.生物芯片技术

B.临床微生物鉴定系统

C.气液色谱分析

D.核酸杂交

E.化学发光技术

Picking tomatoes

For as long as I can remember, Grandma’s plentiful tomato garden has been a sign of summer’s end. Each September, just as the decreased heat of the sun suggests cooler days, Grandma requests my help in her tomato garden. She convinces me she cannot pick tomatoes without my youthful eyes and quick mind. She says we need to examine each tomato and agree on its readiness for picking. While Grandma’s request for my help in the tomato garden is always the same, her desire for my help seems to increase each year.

Grandma has eyes for finding even the tomatoes hidden by undergrowth and other tomatoes. I, however, just turn circles looking for the ones I think Grandma will like. I spot what looks like a ripe tomato, head in its direction, and then get sidetracked by another that appears to be equally ripe. I usually end up watching Grandma and trying to stay out of her way, which seems the only way my eyes and mind ale useful.

There we are, lost in the tomato vines（藤）. Grandma’s eyes are always knowing, and they are no different in the vegetable garden. From afar she spots what looks like a ripe tomato. As she walks toward the garden, she evaluates the tomato for a second time. but from a different angle. I already know it will end up in the basket with the pile of others Grandma has carefully chosen. However, Grandma acts as if she needs a final look to be sure. She calls me to her side, kneels beside the vine while enjoying the warmth of the fading sunlight on her face, and grasps the tomato in her hand. She turns each round, red ball toward the sunlight before disconnecting it from thevine with a half-hearted smile.

She then looks at me. I nod my head and smile. Grandma assumes I smile in agreement with her tomato selection. I know I smile, instead, at her.

小题1:Why does Grandma ask the author to go to the tomato garden with her?

A．He can help pick more tomatoes.

B．He can learn the hardship of labor.

C．She enjoys staying with him while working.

D．She tries to share the happiness of harvest with him.小题2:The second paragraph shows that the author   .

A．is an inefficient tomato picker

B．really has youthful eyes and quick mind

C．has spent a lot of time gardening with Grandma

D．is a naughty child trying to be out of Grandma’s sight小题3:In the last paragraph, the author smiled to Grandma because he   .

A．realizes her true intentions

B．feels very happy to pick tomatoes for her

C．confirms that her choice of tomato is great

D．appreciates her skill in finding ripe tomatoes小题4:What can we infer from the story?

A．The grandchild will become more skillful at gardening than Grandma.

B．Grandma will develop more patience in working with the grandchild.

C．The grandchild will gradually become more independent of Grandma.

D．Grandma’s need for the grandchild's company will grow over time.

男性幼儿，4岁，发热、咳脓痰2周。体温波动于38～39℃。X线胸片示右肺下叶大片致密影，右侧胸腔积液。最常见的致病菌是（）

A.厌氧菌

B.链球菌

C.葡萄球菌

D.大肠埃希菌

E.肺炎球菌

试述烧伤败血症的临床特点。

受荷载、（）、集中排水等影响，穿堤建筑物与堤防接合部易出现变形和缺陷。

A.作用

B.沉陷

C.强度

D.密实