拟建项目正常排放菜种污染物质（比重ρ≈1）的一阶袞减系数K=O，预測下游混合均匀断面的平均浓度时，应优先采用（）模式。
A.—维动态
B.二维动态
C.一维动态
D.零维动态
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| 阅读理解。 | |||||||||||||||||||||||||
| SUNNY SCHOOL We are a school for children of 6-15. We want a cook, a library assistant, a P. E. teacher and a language teacher.
| |||||||||||||||||||||||||
| 1. The children of _______ can go to Sunny School. | |||||||||||||||||||||||||
| A. 5 B. 16 C. 8 D. 3 | |||||||||||||||||||||||||
| 2. Tom is 20 years old, and he can speak Chinese and English. He also plays sports very well. So he can be _______ at Sunny School. | |||||||||||||||||||||||||
| A. a cook B. a P. E. teacher C. a language teacher D. a library assistant | |||||||||||||||||||||||||
| 3. _______ doesn't need to speak English. | |||||||||||||||||||||||||
| A. The language teacher B. The library assistant C. The cook D. The P. E. teacher | |||||||||||||||||||||||||
| 4.A library assistant must _______. | |||||||||||||||||||||||||
| A. be between 20 and 40 B. write English well C. be healthy and strong D. know different kinds of books well | |||||||||||||||||||||||||
| 5. This Wanted may (可能) come from _______. | |||||||||||||||||||||||||
| A. a newspaper B. a history magazine C. a story book D. a movie |
体胖食少，神疲乏力的临床意义是（）。
A.形气有余
B.形盛气虚
C.中焦有火
D.中气虚弱
E.脏气衰竭
西方国家经济出现的“滞胀”，指的是几种经济现象并存，他们是（）。
A.经济增长停滞
B.外汇收支停滞
C.产业结构失衡
D.通货膨胀
E.存在大量失业
京剧花脸必须用真声，偶尔用假音是为了（）。
A.表现喜剧效果
B.韵白更有吸引力
C.偷换气息
D.剧情的起承转合
在小接地电流系统中，某处发生单相接地时，母线电压互感器开口三角形的电压（）。
A.故障点距母线越近，电压越高。
B.故障点距母线越近，电压越低。
C.不管距离远近，基本上电压一样高