线粒体各部位都有其特异的标志酶，其中内膜的标志酶是（） 细胞色素氧化酶。 单胺氧化酶。 腺苷酸激酶。 柠檬酸合成酶。
短路时，电源产生的电能全消耗在（）上。 电源内阻。 导线。 负载。
A flashing red light displayed at a single lock means that the lock（）. is ready to use but vessels must stand clear。 is ready to use and vessels may approach。 cannot be made ready immediately and vessels shall stand clear。 cannot be made ready immediately but vessels may approach。
在动物细胞培养过程中要用什么显微镜来观察细胞分裂状况？（） A.电子显微镜。 B.暗视野显微镜。 C.倒置显微镜。 D.普通光学显微镜。
You are on an ice-reinforced vessel about to enter packice. You should（）. enter the pack on the windward side where there is a well defined ice edge。 trim to an even keel or slightly down by the bow to take maximum benefit of the ice reinforcement。 take maximum advantage of coastal leads caused by offshore winds。 look for areas of rotten ice and enter perpendicular to the ice edge。
A flashing green light displayed at a single lock means that the lock is（）.
