在酸、碱及硬水中都比较稳定的表面活性剂是()。A、阴离子表面活性剂 B、非离子表面活性

题型:单项选择题

问题:

在酸、碱及硬水中都比较稳定的表面活性剂是()。

A、阴离子表面活性剂

B、非离子表面活性剂

C、阳离子表面活性剂

D、二性表面活性剂

考点:酸洗工酸洗工题库
题型:单项选择题

水停胁下,肝肺气机不利,升降失常,气饮相搏是下列哪项的证候机理()

A.痰饮

B.悬饮

C.溢饮

D.支饮

E.伏饮

题型:单项选择题

蝗虫与家蚕的发育相比,蝗虫不具有的时期是(  )

A.受精卵

B.幼虫

C.蛹

D.成虫

题型:单项选择题

关于子宫动脉,叙述错误的是()

A.在宫体与宫颈交界水平两侧可显示子宫动脉血流

B.频谱呈尖峰状,单相,上升速度快,下降速度稍慢

C.子宫动脉起自髂外动脉

D.双侧子宫动脉血流频谱形态及流速较对称

E.子宫动脉的阻力指数随月经周期呈规律性变化

题型:单项选择题

Future Computer Trends:
The components of a PC will be built into the (6) and large plasma or electroluminescent flat panel display hanging on a partition wall will act as both a (7) and videophone display.
A high resolution, touch sensitive LCD (8) into desktop will allow pan-based pointing and data input. In the home, meanwhile, computers will become as ubiquitous as TVs.
Computer interfaces will be far friendlier than (9) graphical user interfaces (GUI) of today. Computers will use "human interfaces" based on multimedia.
RISC microprocessors will finally obliterate the ever thinning gap between workstations and PCs. Similar advances in nonvolatile flash memory will lead to the replacement of magnetic (10) disks with electronic "silicon disks".

A.desk

B.monitor

C.built

D.mouse-driven

题型:单项选择题

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