【单选题】下列有关细胞的结构与功能的叙述,正确的是
A.
线粒体内膜上附着与细胞呼吸有关的酶,与其分解丙酮酸的功能相适应
B.
通过碱性染料染色,在光学显微镜下可看到高等植物成熟筛管细胞的细胞核
C.
真核细胞中有维持细胞形态的细胞骨架,细胞骨架与物质运输有关
D.
生物膜功能的复杂程度取决于膜上糖蛋白的种类和数量
【单选题】If you are in another person's home and want to smoke, what should you do?
A.
You had better give the host (男主人) a cigarette.
B.
You should ask the host or hostess if they mind your smoking.
C.
You shouldn't light up until you get their promise.
【单选题】The answer is connected with the main use______ the body makes of food—to supply the energy for movement.
【单选题】商务交往中私人问题有"五不问"的要求,下面哪种行为是不正确的()