下面哪一项不会在菌类植物的生活史中出现（） 具有性生殖和无性生殖阶段。 不具世代交替生活史。 植物体内不含叶绿素，异养生活。 有配子体和孢子体之分。
我国最早的电影理论是（）理论。 戏剧。 文学。 蒙太奇。 影戏。
中国人说“恭喜发财”时常用（）。 合十礼。 拱手礼。 握手礼。 吻手礼。
未稳定原油的分馏稳定是在（）中完成的。 除油器。 蒸发器。 分馏塔。 重沸器。
A multistage centrifugal pump can be BEST described as having （）. two or more impellers housed together in one casing and mounted on a single shaft。 a single stepped impeller mounted in a progressively staged casing。 a large radial clearance between the impeller and casing to prevent overheating due to。 an increase in the discharge velocity of the liquid with a corresponding decrease in pressure through the stage。
Where events have rendered performance of the contract illegal either by English law or by the law of the country in which performance was to have taken place，the Charterer will（）from the liability to provide a cargo.
