【判断题】昆虫血液兼有哺乳动物血液和淋巴液的双重作用。
【简答题】Touring Guilin Guilin is primarily known for its charming and unique scenery. It has always been considered as (1) . Many Chinese poets and painters, both (2) included, have been' drawn to these pa rt...
【单选题】Guilin is the west of China.
【单选题】—Where's Guilin? —It's _____ the south of China. [ ]
【简答题】钢筋入模后必须保证其混凝土保护层厚度符合设计要求.当钢筋保护层厚度用水泥砂浆或塑料垫块的方法来控制时,下面叙述错误的是().A﹑垫块间距通常在1-1.5m左右 B﹑垫块的尺寸不宜过大,通常在3-5Cm之间 C﹑水泥砂浆垫块的材料和颜色应和制作的构件颜色相同,强度可略低于制作构件的混凝土强度 D﹑塑料垫块应专门制作,在确保有效控制保护层厚度的同时,还要充分确保塑料垫块和混凝土的固结
【单选题】—Are you ready _______ your trip ______ Guilin? —Yes. [ ]
【简答题】昆虫血液的作用主要有[填空(1)] 、[填空(2)] 、[填空(3)] 等。