问题
单项选择题 B1型题
药材大连湾牡蛎的性状鉴别特征是（）
A.贝壳呈四方形，背腹缘几平行，腹缘圆，单壳
B.贝壳呈长片状，背腹缘几平行，右壳较平，左壳凹陷很深
C.贝壳呈类三角形，背腹缘呈"八"字形，右壳外淡红色
D.贝壳呈圆形、卵圆形或三角形，右壳较小，表面环生同心鳞片
E.贝壳呈类三角形，背腹缘呈"八"字形，右壳外淡黄色，内面白色
答案
参考答案：E
搜题请搜索小程序“爱下问搜题”
药材大连湾牡蛎的性状鉴别特征是（）
A.贝壳呈四方形，背腹缘几平行，腹缘圆，单壳
B.贝壳呈长片状，背腹缘几平行，右壳较平，左壳凹陷很深
C.贝壳呈类三角形，背腹缘呈"八"字形，右壳外淡红色
D.贝壳呈圆形、卵圆形或三角形，右壳较小，表面环生同心鳞片
E.贝壳呈类三角形，背腹缘呈"八"字形，右壳外淡黄色，内面白色
参考答案：E
| Reading comprehension. (阅读短文，选择最佳答案) |
| In England, people don't usually talk much. You can go on a bus, or in a train, and everyone sits looking out of the window. Often they read. They read books and papers, but they don't talk much. When you meet English people, they often talk about one thing-the weather, so when you meet somebody in England, you can say, "Nice weather for the time of year!" "but it was a little cold yesterday," somebody may answer. "but it got a bit warmer later," you can say. Talk like this, and the English will think, "How friendly you are!" |
| 1. English people often ______ on a bus. |
[ ] |
| A. talk much B. talk about C. eat something D. read papers |
| 2. When you meet English people, you can talk like this ______. |
[ ] |
| A. how do you do B. how are you C. nice weather D. nice to meet you |
| 3. If you talk with the English people about the weather, they will think . |
[ ] |
| A. you are friendly B. you are right C. you are English D. you talk too much |
| 4. English people always hope the weather will get . |
[ ] |
| A. better B. warmer C. colder D. hotter |
| 5. which is right? |
[ ] |
| A. English people like to talk on a bus. B. English people didn't enjoy the best weather. C. English people are the most friendly. D. English people don't talk much. |
铅酸蓄电池厂改扩建
某铅酸蓄电池企业拟对现有两条生产能力均为25万千伏安时/年的生产线(生产工艺流程见下图)实施改扩建工程。
现有工程生产工艺废水经混凝沉淀述标后排入城市污水处理厂，地面冲洗水、职工浴室和洗衣房排水等直接排入城市污水处理厂。采用“旋风+水喷淋”或布袋除尘处理含铅废气，采用碱液喷淋洗涤处理硫酸雾。制板栅工段的铅污染物排放浓度监测结果见下表。
| 现有工程生产线制板栅工段含铅废气监测结果 | ||||
| 工段 | 风量/(m3/h) | 初始浓度/(mg/m3) | 排放浓度/(mg/m3) | 排气筒 |
| 制板栅 | 4.0×104 | 4.26 | 0.34 | H=15m |
改扩建方案为：保留一条生产线。拆除另一条生产线中的熔铅、制粉、制铅膏、制板栅、涂板、化成、切片等前段工序，将其配组总装工序生产能力扩大为50万千伏安时/年。
注：《大气污染物综合排放标准》(GB 16297—1996)铅排放浓度限值0.70mg/m3，排气筒高15m时排放速率限值0.004kg/h；《工业炉窑大气污染物排放标准》(GB 9078—1996)铅排放浓度限值0.10mg/m3。
[问题]
说明工程分析中应关注的焦点。