数控线切割机床U、V移动工作台，是具有（）加工功能的电火花线切割机床的一个组成部分。

FIDIC执行委员会由当年的成员协会代表投票选举确定，执行委员会最多由( )名成员组成。

A．5
B．7
C．9
D．13

发生血管内溶血时，相应的改变是（）。

A.血清结合珠蛋白明显增高

B.血浆高铁血红素白蛋白呈阴性

C.血浆游离血红蛋白明显降低

D.尿含铁血黄素肯定呈阳性

E.尿血红蛋白可呈阳性

The blue of the sea is caused by the scattering of sunlight by tiny particles suspended in the water. Blue light, being of short wavelength, is scattered more efficiently than light of longer wavelengths. Although waters of the open ocean are commonly some shade of blue, green water is commonly seen near coasts, especially in tropical or subtropical regions. This is caused by yellow pigments being mixed with blue water. Phytoplankton are one source of the yellow pigment. Other microscopic plants may color the water brown or brownish-red. Near the shore, silt or sediment in suspension can give water a brownish hue. Outflow of large rivers can often be observed many miles offshore by the coloration of suspended soil particles.Marine phytoplankton (Greek for "plant wanderers") are microscopic single-celled plants that include diatoms, dinoflagellates, coccolithophorids, green algae, and blue-green algae, among others. The growth of these organisms, which photosynthesize light, depends on a delicate balance of nutrient enrichment via vertical mixing, which is often limited by the availability of nitrogen and light. Diatoms are one-celled plants with patterned glass coverings. Each glass, or silicon dioxide box, is ornamented with species-specific designs, pits, and perforations making them popular with microscopists and, more recently, electron scanning microscopists.

Which of the following is NOT a type of phytoplankton

A．Green algae.

B．Diatoms.

C．Blue-green algae.

D．Amoeba.

简述烟丝的含水率对烟支产生的影响。

社会进步的根在于（）推动。

A、经济发展

B、文化蓬勃

C、政治人民有参与国事的权

D、社会内部抵牾